To get Testosterone, you will need to go to a Therapist, Try and find one that specializes in Gender Theraphy, You will need to visit with them most likely once a month minimum, for minimum 3 months, before they will write a reccomendation letter for you to see a Endocroligist who will do blood work with you to determine whether or not you are healthy enough to get the T,
Most likely your therapist will want to see you for around 6 months before they will write the rec letter, and thats assuming that you have no other major issues to work out prior, Some therapists have other reqs before that letter though.. as well.
Good luck
Oh and for your mother, honestly I can offer no advice, I am in a situation with my Girlfriend right now, and lets just say things arent pretty and peachy, as far as I can tell it takes alot, alot of time, let them get "it" at their own pace, try not to force it upon them. It is really hard for someone who raised you and only saw you one way for a long time to have to look at you another way, they have to learn to reaccept you, re love you, and get over the fact that in many ways they feel their child "died", and then a new child was adopted.
Take care