a general piece of advice, for fedi and elsewhere
Even if you're marginalized, you are probably privileged among *some* axis. And sometimes, or even often, the right decision is to just step back and *absorb* things. You don't need to have an opinion about everything. It's fine to excuse yourself from a discussion.
Follow some people who are marginalized or living a different kind of life in a way you are not familiar with. Quietly. Not commenting on their experiences or giving advice, just *absorbing* them. For months, if needed.
I promise that you'll learn things you'd never considered before, and the only thing you have to do is listen quietly, and stop yourself from responding to them. Nobody will expect you to opine on them just because you've read them.