Best tool for memorizing openings?

What is your best tool for learning and memorizing opening moves?
Video teachings do not seem to make a lasting impression on me.
Ideally, I think a great tool would be an interactive program that prompts you for the next best move and then shows you the 'answer' but allows you to repeat this exercise until you have it memorized.

My chess instructor believes that memorization is, at times, a mistake. He recommends the following books: 1) The Game of Chess and 2) My System. Now, before you go out and buy ANY books, including the aforementioned, you might want to set some goals for yourself which are reasonable. You might want to become a FIDE master someday. I don't have any idea how young or old you are. Perhaps, you just have short-term goals. If you have your heart set on memorizing an opening (take the Ruy Lopez for example), try to remember the logic behind the moves at the same time you are memorizing theory. What would you do if your opponent played a move which is unorthodox, but just as good as the moves you had learned? You might run into time trouble while you ponder the correct move(s). Also, take notes while you study. Try to write it in your own words, if this is possible.

The above books should be read in the order they are written. The second book has a lot of strategic ideas...the first deals with tactics. You will want to learn king pawn openings (not necessarily all of them) before you try queen pawn openings, unless you have an enormous amount of time on your hands and can easily switch back and forth. A great tool for learning chess is a database. However, some of them out there are meant for Masters and above. Unless you have a really firm grip on everything related to chess, you might not want to spend $200 or more on a database program.

Lichess has some good options for beginners thru advanced players. There are many players on here who are already Grandmasters. While I have never played them (they would squash me and it would not be much fun for them either), there is a way to study your games on this site.

lucas chess app
https://lucaschess.pythonanywhere.com/

You should try cheesable

I ran out of room, so I will try to keep this shorter than my last reply. Some people use one of those books for learning all of the openings (or all of them up to the date of publication). If you are worried about winning and losing more than the average player, you can always find out which line of which sub-variation works best for you. They have statistical data which include the percentage of wins by white or black. Bear in mind that many losses occur because of mistakes and blunders. You often need to just play chess and let go, instead of worrying about every move. There are so many variations of each opening. One should not try to memorize openings BEFORE learning the reasons behind the moves...

Okay, I am almost done. You must remember that rapid development (moving your pieces to good squares in as few moves as possible) is essential to winning (or sometimes drawing) a game. Controlling the center is also very important.

You can have your openings in a Lichess study and if you want to memorize them, just hide the notation by putting smth in front of your notation like a blank piece of paper or anything else :)

Repetitive...go on casual mode

@jeffchess2022 said in #1:

What is your best tool for learning and memorizing opening moves?
Sparring.

Create your repertoire in a lichess study and click on the "preview" button. It will allow you to make your moves and play the opposing move for you.

A lot could be done with a chessboard, pen & paper, and some flashcards. Not everything has to be on a computer.
Now get off my lawn!