I’m going to gather together the comments on outreachy from the other thread, because they’re a little too thinly spread for my liking, and it feels like a relatively concrete thing to think about:
@cafkafk suggests https://www.outreachy.org/ (in this comment), which “[…] provides internships to people subject to systemic bias and impacted by underrepresentation in the technical industry where they are living”
(I think that community hostility and lack of moderation seems like a bigger / more urgent issue, though I haven’t been in this community long; this outreachy stuff doesn’t directly address that, but I thought it’d be useful to gather here anyway.)