I have a section called portfolio were you will click on a portfolio thumbnail and it will come up above the thumbnails
That’s called an “accordion” slider. You could probably find some jQuery plugins that would be suitable for this, though you would need to modify where you click to open/close each panel.
The second section that will have dynamic content is the services section… when a link is clicked the content will load in the same div
That would be a job for ajax, which jQuery also has utility methods for. Take some time to study how ajax works (not the jQuery methods specifically, but the AJAX process itself) first, or you’ll be lost trying to implement it.