Owning up to your past is almost impossible. Whatever you say will very likely be twisted into something unrecognizable that'll fit into cissexist conception of what you are.
Relating to cis people is highly complicated, as most cis people build their lives as mostly coherent, decades-long wholes; you've had two lives, one in closet, one in the open, and it's pretty hard to bring stuff from one to the other. Well, unless you're ok with being a freak and having yourself identified as one forever.
You don't really learn how to relate to the cis: in the beginning you have to lie both to other people and to yourself as convincingly as possible, in order to survive. How does one learn to relate to other people while doing that? One doesn't. You can stop the lie, but the years are permanently, forever gone. You don't get your childhood back. You don't get many of your formative years back - you just have to make do with what the lies and deceit gave you.
Yet stopping the lie is one of the most important things you can do.
Hanging out with the other, similarly marginalized people won't help much. Sure, they understand a lot, but what you've got in common with them is the trauma, the bile, the hate, the hurt. Who wants to center her life around that? Not me.
You might end up alone. It's still better than lying and deceit, and it's also better than wallowing in your trauma.