Winter Month: 3 
Day 
I was practicing painting trees and figured I'd make this, maybe it'll help someone.
You Will Need
- Gimp (Photoshop should work too)
- I did NOT use a tablet, but it would be easier with one.
Step One
Paint your base. I use these brush settings. https://i.postimg.cc/vZZVzFxB/Webp-net-resizeimage.png
Use a larger size (I use 20.00) for the base.
Step Two
Start painting! Select a medium green shade, and paint a shape that looks like a tree, like this.