The following is a quick version of my drawing/painting process whenever I combine traditional and digital tools:
 

My process starts with a very loose and relaxed sketch using either pencil, ballpoint pen, or ink.
At this stage, I don’t focus too much on accuracy - I just try to find some idea or some shape I like. This always takes a while.

Once I’m happy with the rough sketch, I scan it and bring it into Procreate, where I use a brush that feels sort of like a real pencil and definitely better than anything I could use in Photoshop. Here, I create a second, more refined sketch, adding more details and paying closer attention to proportions and accuracy while still staying sort of messy.
 

Once the refined sketch is done, I print it out and transfer it onto paper using a lightboard. This step can be tricky since you can lose a lot of the energy you had in your first sketches if you try to make it too perfect, and it happens a lot that I need to start over because I was trying to draw to clean, and it turned out horrible.

I then complete the drawing using ink, making final linework decisions before scanning it back into the computer.
 

In Photoshop, I begin the painting process. I experiment with lighting, shadows, colors, and overall mood, making adjustments until everything feels right.

I try to retain as much of the traditional feel as possible throughout the digital process. I also tend to switch to very small brush sizes fairly quickly, as I enjoy working with lines and scribbles, allowing texture and movement to come through in the final piece.