You said you might start by "taking only a little bit of testosterone for now" -- taking a "little bit of testosterone" can affect you (your voice, for one thing) permanently. Before embarking on any hormone process, do the normal things: see a TS psychologist regularly and make damn sure of your course of action before doing anything. If you're still feeling compelled, you should do the "real life test" of living as a guy for a year or more. There are millions of reasons to NOT proceed. One key factor is seeing whether you can be truly comfortable living full time in what you feel is your true gender. Sometimes, bigotry and poverty can be even stronger deciding factors in changing people's minds on whether to transition.
Sorry to take a cautious view, but sometimes you THINK you can take something (like bigotry) but, in living it, you find out that it's more difficult than it seems.
Good luck in whatever path you choose.
Teri Anne