Since ProvoCraft, the maker of Cricuts, legally forbids any 3rd party software from communicating directly with their cutters, you'll need to export your files as SVG from SCAL and then import that SVG file into Design Space for cutting. To do that, create your design in SCAL5, then go to File>Export, provide a name and note where you are saving the file. Then, in the next window, mark the box for Design Space compatible (just that box, not the others).
If you need help learning the many design functions in SCAL, here is a link to the detailed user manual I've written for SCAL5:
https://www.iloveknk.com/support/sure-c ... l-support/
Feel free to post more questions, as you have them.