Hello! Welcome to susans.
I'm going to try to keep this post short, since I've noticed that I have a habit of rambling on and creating really long posts, and I don't want to kill your eyes or anything with a huge wall of text.
Anyway, like Andrew said, everyone's journey is different. My personal advice would be to first find a therapist you feel comfortable talking to. It may take a few tries, but don't let yourself get down. If you don't mesh well with one therapist, don't force yourself to keep going to that person, find someone else. I ended up going to three different people before I found the one I have now, and will continue to have during my transition. Keep in mind, though, that it may be better to search for someone who has at least some experience with transgender people. If you can't find anyone in your area, there are ways you can do online, or over-the-phone therapy. I personally don't have information about that, though. I found that the therapists who aren't connected to a large hospital or corporation of some sort are the best for me. Also, those private therapists seem to have cheaper bills (mine in $30 per session, in person), which is good since my insurance doesn't cover any mental health stuff. Therapy will help you figure out whether this is the right path for you, and also can help you deal with any other problems, not to mention the fact that many physicians and surgeons require a note from a therapist (if you decide to pursue hormone therapy and/or surgery).
The next thing I would suggest is to start wearing more masculine women's clothing or unisex clothing in your daily life, rather than just in private, if your not doing so already. Nowadays, it's pretty common for women to wear masculine clothing, so your friends/family shouldn't find it too strange. Most people close to you have probably already picked up on the fact that you're not a supremely feminine creature. Once you feel comfortable enough, you can just wear men's clothing all the time. Also, if you don't bind already, consider getting a binder (in your size). It may help you feel better.
Good luck!

Edit: After all that, I ended up with a long post. Good grief.

Sorry.