I was like you and I took the plunge when W10 was given its death sentence. I watched a few tutorials on YouTube, picked a distro (Mint, it feels very familiar if you come from a windows environment) and after a few days of dual boot I got rid of Windows for good. Never looked back.

Initially there were some little hurdles with games, you can install Steam very easily (flatpaks are a godsend) but only a small selection of games are Linux-compatible by default. Then I heard about Proton, and with another flatpak installation boom all my Steam games worked, and damn well I have to add.

Then I heard about Lutris, and my Sims games that I thought I'd never get to play again now work.

Please don't worry about not knowing what you're doing, if you pick a distro like Mint you will not have to mess up with the terminal unless you choose to. Try running a distro on a virtual machine to see how it feels!