Where to start learning how to create 2D art assets?

Where to start learning how to create 2D art assets?

Hello,

I have an idea for an interactive visual novel that I want to build. I have worked for AAA studios as an engineering intern before and while I have no problem with programming, I don't have an artistic bone in my body. So I wanted to ask where I can start learning how to create 2D assets for my game. I do have a visual style in mind but no technical skills to materialize them. Premade and paid assets won't exactly work for this project due to the visual style I have in mind being a little unconventional. 

Can someone point me towards resources a beginner at 2D art can leverage?