Hello Fayde. Nice to hear from you.
Quote~is there a personality change?
I can't really comment on this, as I've yet to start T, but I wouldn't think so. I think it depends on the person. I'm glad you asked though, one of the other guys should be better able to answer. I know I want to retain some emotional capacity. As I mentioned on another thread, should T turn me into a stoic, there's always that river near my place.

Quote~what if I change my mind after I start this?
This could be a problem as many of the effects of T are irreversible. It's better to wait and really examine this, than to rush into it, if you're not sure.
Quote~what is the best way to learn to "present" as male?
I've read somewhere recently that some FTMs take a bio-guy as a "mentor". I think it depends on the FTM in question and his own personal experiences and lifestyle. If he's somebody who's spent an eternity in an "all women environment", a mentor may be beneficial.
I can't speak for others, and I'm certainly not the most conventional guy, but I think it is better to just be yourself. I don't fit the stereotypical male archetype and have no desire to. As I mentioned elsewhere
QuoteI don't want to pass as male if it means I can't display my own innate gestures, speech, walk, etc.
Transition is all for nothing if I can't be ME.
However, if this is something you're going to be self-conscious about, (constantly measuring your mannerisms and movements for any trace of effeminate behaviour) a mentor may be best, as your insecurity may be conspicuous.
Good luck with your move.
Nero