Configurate permanent link

Hello,

I am trying to organize my urls on https://br.biawatanabe.com/ by categories for both blog and portfolio.

I would like to use the fallowing structure
( XXX category name, YYY article name)

https://br.biawatanabe.com/portfolio — porfolio home
https://br.biawatanabe.com/portfolio/XXX — portfolio category page
https://br.biawatanabe.com/portfolio/XXX/YYY/ — portfolio post

https://br.biawatanabe.com/blog — blog home
https://br.biawatanabe.com/blog/XXX — blog category page
https://br.biawatanabe.com/blog/XXX/YYY/ — blog post

First i would like to change this page url https://br.biawatanabe.com/portfolio-da-bia/ for https://br.biawatanabe.com/portfolio/, but the page https://br.biawatanabe.com/portfolio is already use for an other pages. I would like to disactivate the default portfolio page, and then it is easy change my page url.

I can set the blog Category base to blog/ but i don’t know how to set the portfolio Category base (currently https://br.biawatanabe.com/portfolio-category/XXX )

Currently i am using the following /%category%/%postname%/ Custom Structure
Article url in the portfolio are https://br.biawatanabe.com/portfolio/YYY/
When changing the Custom Structure to blog/%category%/%postname%/ it also change my portfolio url form https://br.biawatanabe.com/portfolio/YYY/ to https://br.biawatanabe.com/blog/portfolio/YYY/ which i don’t want to change. Also i don’t know how to make the portfolio category appeared in the url.

Thanks for the help !!

Claude