opening database on chess.com?

Go to players league, find your name, click on it and an archive folder will appear, click on that and it will take you to your games. Scroll down to the bottom and you get an explore feature. (You can also explore your own games) My preference is to make a position, get the FEN and put it in the advanced search for master games, so I can see how a position should be played. You get the master games search in the same area. Anyway the few features you find in that section are good but needlessly difficult to navigate to on the app. You can also create games folders of master games for yourself.