You're going to do great. Keep the seat low and push with your feet to get the feel of coasting, just like kids learn. Small steps and you'll be riding in no time. Depending on where you live, see if there are community bike groups you can volunteer at - these are great for learning about bike maintenance, and some places will let you build a bike for yourself from donated stuff for your time. Bike shops are pretty much universally supportive too.

For what it's worth, I think you already did the hard part by coming here and expressing interest :)