Defitely Godot, especially having a low-end PC. The language, Gdscript is very python-esque, so the entry bar is low. Really, a couple of years ago I tried Unity and that thing wouldn't load even if my life depended on it haha, Godot's load times were pretty much instantaneous.

And there are tons of resources to learning either through YouTube or their official documentation :)

I recommend you start with the oficial documentation "Introduction to Godot" and their "Your first 2D game" sections, If you wanna see quick results you may start with the latter.

Some extra resources:

GDquest YouTube channel, extensive Godot resources

Miziziziz, a quite successful Godot solo developer, he shares guides and tips in a short format

Make an action-RPG in Godot, one of the most complete follow-throughs I've seen for beginners, while building a Zelda-esque game.

How to make a top-down shooter in Godot, same as the latter, but instead you are building a Hotline Miami clone.

If you don't mind some self-promotion, you could also give a look to a couple of FOSS games I've built using the engine, I made them for short game-james so all of them are pretty simple, feel free to use them however may be best to you :)

https://github.com/croobat/ClickerMiner

https://github.com/croobat/Farm-Defense

https://github.com/croobat/lacking-light

And most importantly, don't get discouraged, there are lots of things you may not know but that is fine! It's part of the process. You got this chief.