Portfolio categories missing

Hello,
I have searched through the archives and been googling for 2 hours, but I cannot find an answer to my question.

I am working with a client who wants a Portfolio set-up. I picked the theme Orvis, enabled JetPack and created three portfolios so far. But there is no option for Portfolio Categories. I need categories so that I can display certain portfolios on specific pages. I have three pages where I need just one portfolio to display. I tried using Portfolio shortcode with the assigned project tags (since I don’t have Categories), but that did not work.

This is the site: https://www.carolinesiegfried.com

It is still a work-in-progress, but I am stuck. The homepage is fine with displaying the 3 portfolios, but on the other pages (New Word, Garden, Flora & Fauna), I only want to display that specific portfolio.

When I am logged into the dashboard, and I look at the left column, under Portfolio, I see:
All projects
Add new
Project types
Project tags

I feel like there is something simple I am missing, but I cannot figure it out.

Thank you!!
Lara