Should I download Linux? I do not really like Microsoft and there are many reasons for that.

So I wanted a new Operating Software. But I want to know how many games I can play on it and is it stable?

Which website do I go to download Linux. I see so many websites and I do not really know which one I should choose.

Also are there better free Operating Software or is Linux the best?

I have so many question because I am soon getting my own PC and I am going to build it myself.