Procreate to Digital Download

Hello! I'm very VERY new to Etsy and creating. I'd like to simply draw paper dolls for digital download to start but the info out there is insane and overwhelming. Most videos keep showing Canva or AI generated products and then how to upload from there. That's not what I'd like to do.

Can anyone please help me understand how to just simply draw my own art in procreate and then upload it to Etsy? I want to make sure I don't draw a whole doll or piece and then it be the wrong dimensions or dpi 😅 that would stink!!! Can you even go from procreate to Etsy?! I don't want multiple sizes, just 8x11. Extremely easy, no fuss if possible.

Thanks for any help 🤗