matter what, and whatever you decide, you can always change your mind.

It seems that a paralyzing element in decisions is feeling as if somehow that will be the end all.  Things change every single day.  Why not try the job and see how it goes?  I can't imagine how that would be harmful at all and more than likely will answer a lot of a questions.  It sounds like it will be a wonderful outlet for you at a nearly perfect time in your life.