Welcome to PC gaming
What types of games do you like to play? Loads of free to play games. Are you looking for single player or team games? Team games tend to be the free to play.
Have you looked at Steam's free to play list
https://store.steampowered.com/genre/Free%20to%20Play/
You also have games like League of Ledgends or Heroes of the storm if you want a MOBA, Starcraft 2 has a free to play mode if you like RTS.