It's most important to get educated

This is not the place to cite the Bible and call people sinners.

It's important to get educated because despite the fact you may support people with different gender and sexual identities, unless you know the whole story and the social stigma they live with then you may accidentally say something to hurt or offend them. I encourage you to educated yourself on your own time, searching through google can get you a lot of answers, easily.
Also there is this blog: [link] (Blog may contain mature content.)
On the right-hand side there are a lot of convenient links leading to posts about the particular topic. You should check them all out because there is more to sexuality and gender than just straight, gay, bisexual, and female, male, and transgender.