Thanks everyone!
My mother really surprised me, she spent her free time at work looking things up, she got into contact with a trans person in the community (anonymously), and she knows a trans woman through work and said she'll set up a meeting between us if I ask.
I also came out to my boss, because I trust him a lot, and he's gay so I thought he would have information about local LGBT groups. Unfortunately we didn't get much time to talk privately because of how busy it was today, but judging from his reaction I think I made a good choice.
It feels like my life has done a complete 180 in less than a day. This is the first time I've ever cried because I was happy.
What great news - I'm really happy for you.