What to do if it is difficult for me to remember openings

The game starts like this: white's goal is to win and black's to gain more tempo to win or draw

But what an opening for me to make and what a theory so I recommend you the Queen's Gambit:

This is a relatively easy opening to remember

If it's also hard for you to remember, then go for the easiest one

But what happens if you play black imitating the opponent is a very bad option so what to do?

 For example your opponent plays the Queen's Gambit what to do either you think a lot or you do like me (theory)

I also recommend you learn from chess.com they have a wonderful lesson for this: I also recommend you learn from chess.com they have a wonderful lesson for this: https://www.chess.com/lessons/learn-the-openings

Until next time bye