You've got all the right ideas; don't be afraid to pull the trigger!
Do you think that some of the people haven't made any mestrakes?
You sound like you've got the "people" skill down and now you have to work on the "techs" and "details".
If you want to become a Realtor, do it! But that doesn't sound like what you want.
If you have a friend who's a Realtor, ask to borrow their book, "Real Estate Principles". It will train you in the details and you will at least learn the correct questions. The answers will follow.