I switched to Linux a few months ago after building a new computer as I didn’t feel like paying over $100 for an OS that has ads in the start menu and spammy popups.
Almost all of my games work fine and don’t have any issues with lag. The exception is GTA V which doesn’t work at all and Sims 4 which works fine but EA’s launcher has given me a few issues.
You shouldn’t have any issues with document editing or web browsing. In my experience printing actually works better on Linux than it did for me on Windows.
If you want you could dual boot or keep an old windows system around to play games that aren’t working on Linux, but in my experience, most games, especially indie games, work just fine on Linux.