I’m not surprised about friendica. I will ask the mbin developers to take a look. I will also take a look at lemmy - I know federation works with lemmy.world - I get enough reports about their users here to know that for sure :) I just don’t know how mentions are handled.
I’ve been in the business for about 25 years. I have a hard time recommending people jump in at this point, or at least to understand the market now. While there is constant talk of “unfilled cyber jobs”, the reality is that many people with experience are struggling to find a job in the field.
If you can get in and find a stable spot at a good company, it’s a great career, but those are getting hard to find I fear. Anyhow, please do a bit of reading about the job market for cyber security before making a decision.