Database Design for a cosmetic e-commerce brand

I am developing an e-commerce store which has cosmetic products. Now the challenge I am facing is that seller has a set of nail polish/ lipsticks boxes etc and those items inside can be sold individually as a single product.
There is no issue creating a single product table and put everything there but I don't want seller to keep adding same type of product over and over again which just differs in color shade.
I tried to group them by creating a product table having product name, category, brand and putting individual products inside as a product_variants table which has price, sku, attributes and everything but that made a lot of confusion even for me as I am calling for variants and showing them as individual product on main site, even on admin panel when looking at product list, actual products are inside of product list shown.
My question is How can I make this simpler for me and for seller also. Is there any other way for simplifying this kind of relationship or should I just create a parent table/group and link back all products to them for easy read.
Thanks