Tournament Opening Repertoire and a Coffee Shop Opening?

I've been playing for a few months now and usually just play whatever i feel like. I am pretty sure I am at the point where I need to start setting up a opening repertoire. I've already settled on the Ruy Lopez as my Main Weapon because I enjoy it, but I don't know what to play as black though. I prefer the standard 1. e4, e5 2. d4, d5 classical openings but choosing a main defense has been difficult. I really like the Petroff defense, but don't know if its a good idea to start diving into that opening due to the mass amounts of theory (I have no problem studying it, just seems it's not generally recommended at my level). I have no idea what d4 d5 opening to play, and i don't know what to do against 1 c4 for Nf3. If i had to tell someone what kind of player i am i'd say 60/40 tactical/positional or depends on the day. I feel really lossed lol. I went to the library and found a few opening repertoire books. One by Emms who uses the Bishop's Opening, and Another One based off the Scotch, but I'm not a fan of all there choices on the white side. As far as the black pieces I didn't find much on classical or at least a repertoire for the classical approach.

My Repertoire so far for White
Ruy Lopez
Open Sicilians
Alekhine Exchange
French Terrasch (I had to learn this awhile ago cause 1. ... e6 used to be an auto loss lol)
Pirc/Modern 150 Attack
Caro-Kann ??? (I never settled on a way to fight the Caro-Kann)
Scandinavian ??? (Used to play Blackmar-Diemer but need something more solid)

Black 1. e4, e5
I like the Giuoco Piano against the Italian and the Archangel variation against the Ruy Lopez( I learned these variations naturally by the way. I had no idea people had been playing these openings for 100's of years which i thought was pretty cool), but I am curious about the Petroff and what higher rated players think.

Black 1. d4, d5
Something based off the QGD. I have no idea where to start with this. I see d4 maybe 25% of time so I haven't really developed anything.

Black 1. Nf3 and 1. c4
I also don't see these very often and also have nothing for these openings either then winging it, and hope i out chess my opponent.

Lastly i want a coffee shop opening for causal play is was thinking King's Gambit but the book at the Library was 600 pages by John Shaw lol Maybe another gambit opening with slightly less theory lol? Or should i just go for it?

Ruy Lopez and Open sicilians are pretty advanced and have a lot of theory. I wouldn't recommend either below 2000.

Petrov is fairly simple without a lot of theory but drawish.

Tarrasch and Dutch are good openings vs d4. Both are low theory and can be played against virtually everything but e4. Slav is reasonable but drawish. I don't like the old QGD lines. They're boring, cramped and don't score very well. You also have to worry about move orders and transpositions where openings like the Tarrasch and Dutch you don't.

panov botvinnik is good vs CK.

Scandinavian- You could play the main lines. There isn't that much theory. I still like the BMD though.

The king's gambit is pretty heavily analyzed but still playable without having to know too much at least at lower levels.

@Savage47

No opening is drawish OTB below 2000. :-)

The pretrov is a good choice. You will not lose your time trying it. I used to play it last year for some months. Without theory it is very intuitive. My conclusion at that time was hard to win against weaker opponent but an amazing and solid opening against sttonger one. I would defenitely check the theory now and add it to my repertoire. My point is try it with some theory. Extended it step by step when you encounter problems.. Rq: Lots of People play the 4 knights to avoid the petrov. Check it as well ^^The main thing you have to be ready in blitz is 4 Nxf7 Dubious but surprising when encountered

Against C4 look for c5 with a set up like a dragon sicilian it is what I recommend.

Against D4 you should look at king indian opening if you feel that your are a tactical player. It is very rich and interesting
Gl

My repertoire is easier: Alechin, KIA, KID.

If someone wants me to put something together on how to play the Tarrasch I might if there's some interest. It was Kasparov's main response to d4 in the early part of his his career and Spassky's for his entire career. The theory is ridiculously simple when you compare it to something like the king's indian especially when you consider that you can play a tarrasch formation against 1.Nf3, 1.c4 or virtually anything white throws at you. On top of that you can usually equalize in the first few moves if white doesn't know what he's doing. The results are very good too scoring better than most d4 responses.

If someone wants more info on the Dutch I recommend:

http://www.skdps.com/download/1260362735_Learning%20the%20Dutch%20Defense.doc

Stonewall is a good beginner opening that can be played as white too. You can also reach a king's gambit through 1.f4, e5 2. e4. The stonewall as white is very much like the Colle in that it is a system opening. The downside is that it can get boring and symmetrical. But, if you want to put together an opening rep in a couple of hours the stonewall is your choice. The only other thing to figure out is what to play against 1.e4.

Leningrad is little more advanced but is essentially a king's indian with an early f5. You can reach similar positions to the KID with 99% less theory.

I disagree about similarities between leningrad and KID. On Tarrasch defence i believe Petrosian-Spasski 1966 can be a good starting point.