I screenshoted the settings for the brushes I use!

This one is for sketching -> https://i.gyazo.com/27fa0cb215b68b13926ae76c630a004e.png
This one is for lining -> https://i.gyazo.com/dcabd3ba576849c8bf755d83a6e81ce2.png

I highly recommend SAI since its a fairly simple program! I've been using it for years and didn't really have any reason to switch over to the big guys (ps, csp) tbh