Welcome, TheIcon!
Other people may be able to advise you more, but you could just minimize a photo to make it small (use Irfanview, it is free at
www.irfanview.com) and then upload it to PhotoBucket. PB can also help you make an avatar out of your photo.
If you want to use a photo or graphic of LG15, there is a link to do that. I don't know it, but I'm sure someone else can help. Check under "Questions and Comments About LG15" because there are several threads there from new people with answers from "veterans" about how to make Avatars.
I hope this helps!