>>92999439sketchy lines is a common crutch with amateur artists, you're not confident exactly where your lines should go so you're hiding your sins by leaving room for plausible deniability, kind of like how kids will try to write sloppy answers that could potentially be interpreted as a couple of different letters/numbers in the hopes that the teacher will give the benefit of the doubt.
It sort of works visually, but it doesn't look like an intentional stylistic choice so it will prevent your work from looking more professional.
I'd suggest you start out with practicing gesture drawing to help get a feel for the flow and general placement of lines for sketching instead of this scraggly back and forth.
Lineart doesn't need to take hours, and it doesn't have to be perfect unless you're going for a clean minimal vector sort of illustration. The more you do it the more confident you'll become as to where exactly lines should go, and from there you can move on to experiment with different line thickness.
Just throw an extra layer on top after you establish where things generally should be with a sketch like this, and trace over your sketch.
You can also try the erase/fill method where instead of tracing over it you carve away at the unnecessary lines by erasing them or painting over in blocks of color. This can be an interesting stylistic choice on it's own, but it can also help bridge that gap as you become more confident where things should go.
pic rel where I quickly painted over some while leaving the original lines.
