A 'Where's Wally' style YouTube thumbnail design

I am seeking a talented illustrator to transform a hand-drawn sketch into a vibrant, intricately detailed YouTube thumbnail inspired by the "Where's Wally" concept. This project demands exceptional drawing skills and a flair for creating visually dense compositions that encourage viewers to explore and discover hidden elements. The final illustration should feature numerous small characters and scenes, with a playful tone. The deliverables include a full-color image sized at 1280 × 720 px, in PNG format, along with the source file. I have attached a rough sketch to give you an idea of the detail involved.