Hi Naen! I missed the WIP on this one, but great to see you posting in here.
My first thoughts are really just tying to flesh out the landmass a tiny bit more. I like the parchment texture you've got going, but there still seem to be large open spaces unoccupied by anything which feels a bit strange. It's nice for maps to have room to breathe, but equally I think a little more wouldn't hurt, be it the odd tree, hill or some texture lines.
I'm not really going to critique your linework hugely, as these things largely come with practice. With your mountains, you've got a great start with their overall shapes and adding in some shading. If you have access to a graphics tablet, or something that allows pressure sensitive drawing, that can add a lot, by allowing the mountain lines to taper off into the land a bit more, but equally that's down to taste and style.
If I were you, I'd just keep doing what you're doing. I so often don't finish a piece because I lose inspiration or I'm not happy with it, but it's so much better to call it done even if you're not happy as you learn so much from each one, so it's great you already have that learning mentality! So keep up the good work and I hope to see some more maps from you!