Pick a project you like and donate what you think is fair. The fact that you are donating at all is great man.

I donated $50 to the Dev of the Automation app on fdroid. My car automatically tries to play any media that I had playing before it connected to the car. No way to turn it off, happens on any and every phone ive used. Finally I found this app and made an automation that pauses media after a few milliseconds once the bluetooth connects.

I felt a $50 one time donation was worth it cause they helped me solve one of the most annoying things i deal with. No idea why someone thought that a “feature” shouldn’t have a fucking off button but here we are.