I need a t shirt designer with research knowledge (Merch by Amazon)

Hi, I need a graphic designer who can create T-shirt designs. You should be able to research Merch by Amazon so that you can create a salable design for a small niche. Your work consists of creating the designs and the associated research.

I only need 25 designs at the beginning, depending on how the designs sell, I need new designs. So the business growth depends very much on the designs.

Best regards
Dennis