Request for suggestion/advice/help on what to do next starting from manual sketch-PhS

IMO digital art and traditional art are VERY different and you'll probably end up developing a much different style in digital. The sketches are cool, but off the top of my head they're not really in a style that is easy to transfer over. My suggestion is to either re-sketch it on digital if you did like the concept and go from there, or start a new drawing entirely.

Also I personally hate vector sketches lol, feel free to look at some digital art e.g. the show Arcane or just browse through Twitter and settle with a style you find attractive.