question about gaming distros

hey there, im looking for the best distro for swapping entirely from windows 10 to linux, while keeping my steam library useable. i have over 300+ games and would like to use the distro thats most likely to support most of them now, and into the future.

thats basically it. just looking for recommendations, warnings, do's and dont's, etc. and maybe a guide on removing windows entirely once its all said and done. i dont want microsoft having access once i make the move to linux.

they disgust me.

edit: thanks for the advice, super helpful everyone!