Create Shopify listings from eBay listings

I have 20 products each with between 16 and 30 variations which I need added to my Shopify store. The text and format will come from my eBay listings. Each variation must be named and the picture for that variation uploaded. The products are nautical charts.

I have completed two products as an example.

All 22 products (including the 2 I have done) require SEO.