Wholesaler wanting to start with FBA

I’m a makeup/cosmetics and beauty products wholesaler. I have my suppliers for big name brands like Dior, YSL, Charlotte Tilbury and the most known brands for cosmetics.

I already sell to stores and would love to expand and start selling on amazon, and use fba. Would love to know how can a person start? What should my numbers be post fees, shipping handling and everything? Would love any advice and thanks!