Coding is bit hit and miss. Long back I had used unity and c#, (both were new to me). As of recent, I've been trying to learn godot and c# since I've played a few 2d games. Maybe these would be a good starting point. You may find other engines that require less to no coding as others suggested to be better.

Comics could be funny, informative, or maybe just an "today was interesting" thing, or even introspection. Anything that feels interesting to you.

Videos are even more open, you can make videos on a lot of topics, anything you find interesting, anything you want to teach, and so on. Gaming videos are also nice, once you've started you can learn a lot and settle on something that you'll like (what you play, how you play, how you communicate with your audience,...). There's two big places - YouTube and Twitch. Both are I'd say good places.

A low end computer should hopefully not be a dealbreaker for you, it should be a good way to start. If you're worried that is the case, you can look around and confirm if it can be used to start.