If you can swing it, keep the old PC parts around and put Linux on the old stuff and build up confidence there. I used synergy to move my mouse between windows and Linux and slowly got to the point I felt good enough to jump all in.
I logged into mine a month or 2 ago and realized I was still in tutorial island. I had totally forgotten where I left my character! It was a fantastic experience to go through the F2P quests and leveling again.
I’ll toss 2 mobile games on the list. Desert Golf and Golf on Mars. No ads. No stupid paid trinket nonsense. Just a couple bucks for the game and a very chill and casual 2D golf game.