Create a portfolio page using default templates
To create a portfolio page for your website, open your WordPress admin panel then create a new page, and give it a name (for example: Portfolio) then change page template from page attribute in the right sidebar and choose a portfolio template (Default or full-width) then publish the page.
After that you can customize the portfolio page from the theme options (in Portfolio tab) where you can change the number of portfolio items, layout and style, page colors and more.
You can also customize the portfolio page intro from the “Intro” section.
Create a portfolio page using Portfolio element
You can also use the Portfolio Element in the page builder you’re using (WPBakery or Elementor) to add a portfolio to your page:
https://essentials.pixfort.com/original/portfolio-element/
How to create a portfolio item
You can check the article below to learn how to add new portfolio item to your website:
