Keep going you have the right idea as I did this 40 years ago as few stay with it. I always loved OP art but I wanted to push the limits and I feel I have. My serious work was branding for government and offset publishing for public safety over many year's. Yet I sold 10 of these in my first show all I had, within 15 minutes. So I went back to the drawing board which was super fun then as it is now as well, retired. I wish you all the best.