Yeah, I understand about your not being comfortable with the numbers thing.
I was the same, but you can do what I did when I first started. Use the sliders and move them to the extremes + and -, that's how I got familiar with it.
Anyway, I don't want to pressure you into something, I know there's many other art forms you will be comfortable with.
By the way, here's my profile on DA - https://7thdwarf.deviantart.com