Hey! Welcome to deviantART!
I saw your question on someone I watch's profile about how to start a donation pool, so I figured I could give you a little boost there
to do that, you go up to your profile right up under the top right where you see your llama badge and click 'edit page'. After that, you scroll through the widgets here and select the one for donation pool. & There ya go. Easy peasy
I hope you have an awesome time here, happy drawing~!