Well dont limit yourself to just changing your behavior on reddit. I know solidarity exists in the most horrible places when you feel the world has closed around you. But if you are accepting that you're wrong then keep on this path. Do help, you will hurt. Yourself and others but don't let that set you back keep striving to bring happiness to yourself and people important to you. Sometimes you'll have to make difficult decisions... I would advise against hanging out with people who make it easy for you to fall back into those prejudice and discriminatory behaviors.

Also just throwing this out there, I'm trans. Not everyone is toxic. Find the good ones, dont let em go and treat em like the treasures they are.