I studied something completely unrelated with computer science. I started with programming and then with general computer science and now I know a lot of things and I'm quite probably going to land a job in IT field next year. It's never late to learn something new.

It's requirements will grow, but it's still mostly text and some images. Mastodon is kind of big (not twitter big but bigger and more active than lemmy) and there are people still self hosting their instance and there's lots of donation supported instances.

I think fediverse being instance-oriented should scalate well. As no instance really needs to hold the whole thing by its own.