as I create print ready stuff in Libre Office all the time - books, pamphlets, brochures - all dead easy. I also do a lot of image manipulation, just the basics and not the real heavy stuff the pros do, but I do find Gimp easier to use for my needs than Photoshop when I used to use Photoshop 5

Using Zorin OS (based on Ubuntu) adding an app is dead easy with the Ubuntu Software Centre, so it must be just as easy in Ubuntu.