it's really coming together!

One suggestion (and hey, this is just my personal preference!) is you might want to desaturate the green colour or/and add a texture to the overall map (like a grain texture for the grassland OR a paper texture over the top of the map) Can be finicky though so up to you if it's wroth it.

Here are some pretty awesome resources:

[url=https://stratomunchkin.deviantart.com/art/A-Lineart-Map-Tutorial-for-Beginners-596477563]Stratomunchkin's Tutorial[/url] - comprehensive pdf download
[url=https://djekspek.deviantart.com/art/Fantasy-Map-Step-by-step-tutorial-278093856]Djekspek's tutorials[/url] - he has a library FILLED with individual stuff so have a shuffle through if you like.
[url=https://www.cartographersguild.com/forumdisplay.php?f=48]Anything by these sexy people[/url] Like holy smokes, pretty much everything you could need.

I don't know how many future maps you plan on making, but theres this great book by Jerald Blando called "How to draw Fantasy Art & RPG Maps" which goes through every little thing piece by piece if that's your jam. I doubt you need to go that far, but I thought I might as well mention it :p