@sigourney , game 1:
You played relatively fine until move 8, Qd7. May I ask why you made this move? I can explain why it is bad after you tell me why you did it. If you don't remember thats ok to.
The problems you had in the rest of the game are because of development. Here's what I mean. Look at the position after move 10, Qxe6. The sign of complete development is when your two rooks are connected. Notice that your opponent has achieved this and you have not. You still have an unmoved bishop, and are uncastled. Your opponent has his king tucked away safely, and has both his rooks ready to occupy the central files of the game board. A rule of thumb: Whenever you are behind in development, it is not usually wise to open the game up. Basically, that means that you should not be welcome to files becoming clear of pawns. You should try to avoid pawn trades if you can. That is why the move 10. Qxe6 is a bad move. Your king needs shelter, because you are underdeveloped, and Qxe6 does not keep a pawn on the e-file, thus keeping it closed. Instead, the e-file is now open, and white rooks will soon be an issue there. Much better would have been to take the bishop with your f-pawn.
Your opponent immediately gave you an opportunity to put a pawn on the e-file again, with 11. e5, allowing dxe5. This would have made the game even again.
Since you did not take advantage of this, your opponent was able to keep the e-file open, which resulted in the tactical opportunity he used later, opening the d-file, and then doing a standard rook and bishop mate.
So, basically, the disadvantage about your opening here is: partly, you developed too slowly, but mostly, you allowed your opponent to open files before you were ready to defend yourself. I can try to give you some alternate move choices if you would like.
I can try to help you with your other games too if you would like.
If you have any questions related to any of those games, please, ask away!
In chess, no question is a dumb question, even if it may seem that way!
Good luck!