A cheap premade skateboard isn't going to help OP whatsoever, even if he's using it to ride, since the bearing used in those boards are full of resistance.
OP seems pretty adamant about learning how to skate, so forking over 150 or so for a proper board is not asking a lot.
I'll make a custom one because I do want to know how it works and how I should treat it
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They're not that bad especially for beginners, not the Walmart kind though lol they sell cheap premade boards at a local skate shop in my city
Skate thread? How do you guys set up for varial heels and inward heels?
by pressing X, then square + a direction