/ic/ - Artwork/Critique

Can I get some help.

I can't render clean.
I looked up videos and people use brushes to color, but when I do it, I get weird striations, where you can see each brush stroke instead of it being neat.
Even an anon here who tried helping me, I tried copying their settings for a felt pen, but i still get the same weird overlap dark spot striations.

I've used multiple tablets and get the same thing, so i assume the problem is me, how am I supposed render properly, I'm using the default bushes too.

I tried playing the the pen pressure settings and drew normally like they asked and get this, I didn't adjust this but this is what i get drawing normally. It tried pressing harder but i get scratches on my screen