Knowledge is the enemy of fear. I can't help you with the specifics, because we're two ships passing in the night, but I can give you some resources.
First off, there is a book you should look into called The Transgender Guidebook: Keys to a Successful Transition. It's written by a therapist and has sections dedicated to both MTF and FTM. It has a lot of helpful information about everything from hormones and their biological effects to surgeries to how to pick out clothing for your target gender.
Second, there are some youtube channels I like, there's "The Transition Channel" (as Dena recommended) and "Ask A Gender Therapist". Both have some good information on hormones, therapy, discovering who you are, and the like.
Third, there are a number of podcasts out there by and for trans people that discuss the day to day, in the trenches reality of transition. Knowing what others have gone through is a huge weight of the shoulders.
Fourth, I'd recommend researching some therapists in your area. Your GP may or may not be able to point some out to you, depending on his experience and personal biases. It's a good idea to know who is doing what in the area, and who is going to give you real help.
Fifth, I've run out of tips. Um... I probably should just delete this, but levity is also a good antidote to fear. This is a scary processes, but it's also fun. I liken it to dating. You get to date you, and find out who you really are. Enjoy it.