Also how do I charge for one of my packages? And how would the user go about paying them?
EDIT: I have uploaded the package I want to sell and I listed it as private.
NVM I don't want to sell my packages and I found out how to add screenshots.
To add screenshots:
Manage your packages => Actions => Edit description => Images (Browse)
To sell your packages, we need to verify you account first, please DM.