Hi Timileyin!
Your pencil and charcoal drawings are so beautiful. You are in a very cut-throat industry and competition is not merciful on average. The winning ingredient is time, building a signature, name heritage and consistency. You must be willing to go on drawing, showing up for your work and producing masterpieces in the dark, and improving on your Art and yourself.
Create a signature around your work. Something people can immediately identify as Shoremi Timileyin's work. That is where to begin. People notice difference easily. Always remember, we don't sell artworks, we appreciate artworks and when proper value is placed on that, it will sell itself.