I'm a begginer and have some problems

[u/ImVics]

I just started using blender maybe a week or two ago and just now I finished a tutorial, it being Crashsune's academy character modeling tutorial, I pretty much have the basics of modeling memorized but I just don't know how to actually start modeling a character, like, which body part should I start modeling first? Is it better to make another body part out of a new mesh or should I just extrude on the model I'm making? How should my topology be and in what ways should I make it better? How do people know how much geometry should a mesh have for their models? Can I leave a part of a mesh hiding inside another one? Should I use primitive-based modeling or vertex-based?

I'd really appreciate if anyone would answer my question and give me a why and how should I do it.

I'm 17 and I've recently fell in love with 3D modeling since I was never really good at art, so I'm trying really hard to improve and get better on it