My advice: look at your social world and your "identity" world - not just your own identity but what kind of social group you "identify with."
I know quite a few transmasculine folks who were very very happy in their "queer" social world... totally accepted as transguys or genderqueer or whatever they called themselves... and then.... they took T.
After a couple years, when we start looking like men (not like cute androgynous femme boys, but MEN) our happy femmy queer social circle begins to feel off. We are hairy. We have deep voices. We aren't as empathetic. We "make the women feel uncomfortable." We aren't welcome in (almost always femme-centered) "queer" spaces any more. Or we are welcome, but have to tolerate hearing our friends openly bash and make fun of the hated "cis men."
Some of us then try to find male friends, so we can feel good about being masculine (which we can't feel in "queer" spaces). Maybe we are gay and look for gay guy friends. We then figure out where the gay guys hang out, and find that gay male spaces are ALSO swarming with estrogen-based femme "queers," pushing the gay men into the margins of their own spaces! Gay clubs aren't gay clubs any more. I've even heard several women - without any irony or awareness whatsoever - call Radical Faerie men "oppressors" for protecting male-only safe space! It's heartbreaking.
So then many of us sort of give up, and we gotta just be regular guys and hang out with straight people.
This might not happen to everybody but it's worth mentioning. Are you willing to venture out of queer social circles, maybe even leave "queer" social circles (including online circles, like Tumblr) behind, and hang out with regular ordinary non-trans people? Be a regular ordinary guy?
The reason I am addressing the social world aspect is that, parts of your post sounded very much like someone who is informed by "queer" culture, maybe even youth "queer" culture, such as the idea of switching between genders, or playing with T experimentally. That kind of sounds like a "queer youth culture" way of talking. Please forgive me if I made an assumption.
Now... if you're just a guy, a regular guy, and you want to be a regular guy with guy friends... and you have very serious no-other-option-to-deal-with-it dysphoria... and are comfortable with ALL of the effects of testosterone... Yes, take T. It very well may be great for you if you want to walk around in the world as a man and don't mind looking and smelling like one.
Transition on T isn't about your personal definition of identity, or self-expression. It's about changing your sex, your literal, biological sex, in a very tangible, medical way. Your appearance, smell, temperament, tastes, empathy abilities, strength, interests, sense of humor, social perspectives, sexual orientation... pretty much any part of your personality could potentially change and change a lot. Most people find it worth it. Be prepared, and make friends who have positive feelings about hanging out with dudes. Because... well, just saying.