Honestly, I say get on Anti-Androgens, specific types that prevent deformity and disease from killing your hair, skull and skin, but don't kill the testes and penis. As far as I know, that type exists, and it's what I'm after at the moment.
You can always get breast implants, and if for some weird case you end up hating them, they can indeed be removed pretty easily. Or if you take hormones, grow boobs, and then quit, you can get a breast reduction or bind. It may kill the penis though.
I mean, to be honest, it's not really the end of the world if someone makes a wrong choice; over 85% of this forum seems to have married and divorced 15 times because of bad choices, no one here should exaggerate in order to discriminate against people who have a mixed identity. There are ways, medical, aesthetic, or fake, to follow each and every identity out there, and I believe every single one of them deserves the same amount of respect concerning transitioning options. I will say though that conservativeness is key.
For instance, I've always had a personal plan to do the "non-gender conforming" things first. For example, I want a brow reduction in the style of Milla Jovovich's forhead; her forehead is a lot more female than mine, but it would look great on a male as well. Hormonally, for now, I only want anti-androgens. When I get my nasal revision, I want a very androgynous, attractive nose that fits my face harmoniously instead of fitting a specific gender (I do not want a pinched look with my heritage). I'm not going to transition to full female until I have a few more years of life under my belt, but I want to improve unisex things as we speak, as even in female form, I want to retain who I am instead of looking strange.