Hey, I'm starting to encourage donations, but how do players donate? Do I need a paypal and they give money to that? Or do they buy credits and somehow transfer them to me? Could someone explain the whole process of donating to a forum?

See if they use the default donation process, they buy credits & those credits are donate for your forum.

If you wish, you can give them your personal paypal for them to donate money. So you just get the money.

Alright, thank you. Solved.