Greetings from on up the river,
I think you'll like it here and find plenty of support, valuable information, experienced builders, and info on sources of things you'll need to get your project up'n runnin.
Let me suggest the threads on friction drives, chain & belt drives, and electric / battery drives. (like the Schwinn eBike)
We even have some on hybrids too. Plenty of good reading but
worth the time.
Good luck Dawg !