I recently got an art tablet however it only works on mac and windows. Seeing as I do not have a mac I can only use the old windows computer I have. Any ideas for sites I can use, preferably free, that are compatible with windows? Or anything that I can download on windows to draw?

I use MediBang Paint, you can also use Adobe products.

I believe programs such as Fire Alpaca, Medibang Paint Pro, Ibis Paint, and some Adobe ones should be compatible with Windows

Krita is awesome 10/10 would recommend

The ones i know that are for sure compatible with windows and have a pretty decent to great quality, like others have said, are fire alpaca and medibang. Theyre pretty similar and actually created by the same company