What I do and I think it's good. If you are not pro player (are playing for fun) you can't learn good many openings and can be surprised in some lines. So you have to choose 1-2-3 openings and play only them. With many practice you will be very comfortable with these lines and will never do stupid moves and lose games in the beginning.
How to practice openings?
Once one has chosen openings, I think that there is wide agreement that the way to start is by playing over sample games. Some of us think that it can be useful to use books like First Steps: 1 e4 e5 and First Steps: Queen's Gambit
https://www.newinchess.com/media/wysiwyg/product_pdf/7790.pdf
https://chesscafe.com/book-reviews/first-steps-1-e4-e5-by-john-emms/
https://www.newinchess.com/media/wysiwyg/product_pdf/7652.pdf
as sources of games with explanations intended for those just starting to learn about an opening. Be sure to try to use the openings in games in between sessions of learning. Most of the time, one faces a position with no knowledge of a specific move indicated in a book. One has to accept that as part of chess, and think of opening knowledge as a sometimes helpful aid. After a game, it makes sense to try to look up the moves in a book and see if it has some indication of how one might have played better in the opening. Many opening books are part explanation and part reference material. The reference material is included in the text with the idea that one mostly skips it on a first reading, and looks at an individual item when it applies to a game that one has just played. Resist the temptation to try to turn a book into a mass memorization project. There are many important subjects that one should not neglect because of too much time on opening study.
"... If the book contains illustrative games, it is worth playing these over first ..." - GM John Nunn (2006)
"... the average player only needs to know a limited amount about the openings he plays. Providing he understands the main aims of the opening, a few typical plans and a handful of basic variations, that is enough. ..." - FM Steve Giddins (2008)
"... Everyman Chess has started a new series aimed at those who want to understand the basics of an opening, i.e., the not-yet-so-strong players. ... I imagine [there] will be a long series based on the premise of bringing the basic ideas of an opening to the reader through plenty of introductory text, game annotations, hints, plans and much more. ..." - FM Carsten Hansen (2002)
https://web.archive.org/web/20140627055734/http://www.chesscafe.com/text/hansen38.pdf
"The way I suggest you study this book is to play through the main games once, relatively quickly, and then start playing the variation in actual games. Playing an opening in real games is of vital importance - without this kind of live practice it is impossible to get a 'feel' for the kind of game it leads to. There is time enough later for involvement with the details, after playing your games it is good to look up the line." - GM Nigel Davies (2005)
"... Review each of your games, identifying opening (and other) mistakes with the goal of not repeatedly making the same mistake. ... It is especially critical not to continually fall into opening traps – or even lines that result in difficult positions ..." - NM Dan Heisman (2007)
https://web.archive.org/web/20140627062646/http://www.chesscafe.com/text/heisman81.pdf
"... Once you identify an opening you really like and wish to learn in more depth, then should you pick up a book on a particular opening or variation. Start with ones that explain the opening variations and are not just meant for advanced players. ..." - Dan Heisman (2001)
https://web.archive.org/web/20140626180930/http://www.chesscafe.com/text/heisman06.pdf

Many books available on chessable. Choose according to your choice of opening and also the reviews.
There are free opening sources, 365opening, lichess.

After you learn an opening, and you can say you understand the theory at the time. (you should understand why super grandmasters are playing book moves by that point) just open up your favorite engine, I recommend stockfish 10, and plug and play all your offbeat ideas, and try to find something that works or gives practical chances. If you get excited about something, take it over to live or daily chess.
Yes, this one is free and this one can play better than any human on earth!!
Always ask this free mentor!!
I am a chess player with FIDE rating about 1600. I have selected my openings and want ways to practice my openings to get better at them. I want to know better replies of my opponent, learn the plans of my openings better, want a way to find good games of my openings from the thousands of the games listed in the database. please help.
For the last 3 hours I have been searching for ways to practice openings but all that I got was guidlines for the beginners like-
-choose openings correctly which are of your style,
-don't learn the moves, learn ideas,
please,I need suggestions other than these two.