There are lots of cool queer people.
Gay males are each unique. Some will be totally cool accepting a FTM, some won't. Lesbians can be similarly biased towards MTFs (maybe moreso as a fair amount I know fear men due to abuse and assume MTFs are still male.) Don't assume that the gay community has your back. Don't assume they won't neither. You stand on your own merits. Don't be a trans. Be a person. Be you. The world will like you more, the more sincere you are with them and yourself. The transition process is typically a rough ride the first bit, then like a parting storm, sunshine comes in and caresses you for the first time. Not everyone who was a friend will stay a friend, but the best people will gravitate toward the real you and you will make BETTER friendships.
At least this is what happened for me.