Welcome wineart. 

I too am 'returning' after a few decades of life experience.  Definitely the best thing to be doing at this time of life (if you're still fit, that is), and to me this all feels even more 'right' than it did the first time around.

Regarding your questions, all that you need to know is available here on the Nexus - either in the WIKI, FAQs or Forum posts...lots there to digest!

Liméni