How long has your friend been flying? If he/she has been at it a few years, he/she can probably answer most of your questions as fast as you can ask them. They will probably even help you get started (any true friend would). If he/she just recently started, they can remember the confusion associated with getting started and can relate their experience and will probably have asked most of the same questions you are wondering about.

There is no better way to get involved in RC than to know someone who is already involved. They can help you learn, and you can both enjoy the hobby together.