How to base portfolio on projects in stead of posts?

Hi, I'd like the portfolio page on my new website to be based on Projects rather than Posts with the possibility to search per Project Type. As you can see on my portfolio page https://paulovancuijck.nl/staging2/portf/ , now the categories direct to Posts where I'd like them to direct to Projects instead. On my current website https://www.spotonlichtontwerp.nl/highlighted/ I've been able to categorise Project Types so it should be possible within your theme too I'd think. How do I make this happen? Paulo