I've been a big fan of fashion and models for a very long time and here's what I think you should do first (if you haven't already). Establish a strong presence on social media. Be everywhere online-- especially where fashion and modeling are concerned. These days this is true no matter what line of work you want to pursue.
Through an online presence you can find out much of what can go wrong, who they right people are and who to steer clear of. As for how you look, you could probably model right now just they way you look now. There are dozens of non-hormonal m2f folks in the world modeling womens' wear right now, as well as transitioned TS folks. It's the best time ever to do so. I believe there are even a few agencies dealing primarily with TG models.
Getting into modeling is usually super difficult and full of heartbreaking barriers for anyone, including TG people. You just have to have a thick skin and stay with it because you want to. I even know people who simply started fashion blogs and modeled entirely on their own just because they wanted to. There are no guarantees of fame, fortune or even a good living, but if it's something you love there can certainly be satisfaction for you. At the worst you could discover a fashion-related occupation you like other than modeling and do that instead. Most models are lucky to have ten years of steady work, then they pursue other careers. Keep that in mind and look toward the long term.