Welcome to PPRuNe and to the Wannabee Forum. Don't worry about the flaming - I deal with that!
You will find plenty of people here who wish to help you get a foot on the first rung of the ladder but there are also some routine 'naysayers'.
May I suggest that you ask the medical question in that forum where you will find some equally helpful but better qualified folk to answer?
As for the more general aspects, I really do suggest that you take time to peruse some of the threads in here where you will find that most of your concerns have been asked and answered.
I'll close the thread but PM me if you have more questions and I'll re-open it.
Halfwayback
Moderator