Unless you want to play recent multiplayer AAA titles your steam library will work with little to no tinkering.
There is a website Check My Deck, which is originally designed for steam deck users, but linking your steam library you can check how many of your games will run out of the box, and how many require some additional steps on Linux/Proton.
For the ones not on the list you can check ProtonDB for guides and opinions from other Linux users.