RE: the shakes
i got like that when i first got into the hobby but i ruled it down to not eating anything before i went to the field (overly exciting i was getting to go fly, and nerves just not letting my stomach accept anything.) i still get the shakes a bit when i maiden a new plane or when i take one that i haven't flown for a while (at least the first flight or two).
if it doesn't get any better i would consider talking to your doctor a bit further about it. this could be something needing treatment with something other than a beta blocker.