Considering you have a low end pc i'd recommend trying godot. As someone who has been in the gamejam scenes for few years now I have seen it be used more and more. It is not the most powerful engine, especially compared to unity and unreal. It however is by far the easiest both on user experience and on computer resources. As a bonus it is fully free and open source, which is always nice. For the learning part I'd recommend just starting, being bad at something is the first step in being kinda good at something (this is a quote from somewhere, and i dont remember from where). Good luck!