Converting an already existing Main Navigation Page into a "sub" Portfolio project page. HELP

Site URL: https://shadenkassas.com/

Hi guys, after creating just one main navigation page 'User experience design" to showcase a project, I realized I'd like to have a portfolio page as a main navigation and then insert the old main navigation page "User Experience Design" as a sub page as one of the projects in the portfolio. 

Unfortunately after trying so hard to move the page and figure a way around it, it seems impossible 😞 

Is my only solution starting the page again from scratch as sub page in the portfolio page? 

Please please please help me find a solution. You can see the sequence in the images below: from the original page to adding the portfolio as a main navigation and then I dont know how to insert the old main page in the portfolio as a project page...

Thank you guys

You mean, move "user Experience Design" into Portfolio page, to make "user.." become sub page of Portfolio Page?

Yes exactly! is that possible?

10 hours ago, Shaden said:

Yes exactly! is that possible?

Hi. Not possible.

You need to recreate manually or use tool to copy content to portfolio