Hi @valentinameireles07 - and welcome to the PBC!
I recently wrote this blog post about How to Secure Paid Pinterest Brand Partnerships:
https://community.pinterest.biz/t5/blog/how-to-secure-pinterest-brand-partnerships/ba-p/41153
(It also serves as a round up of some of the best official resources on the subject of brand partnerships on Pinterest!)
I hope it helps kickstart your research!
