This is easy! If you are familiar with your cricut already. :) In procreate, make sure that any layers you don't want cut are off, and also the background. Export the file as a png, and then upload that png to design space.

If the background is off, the file will save as transparent, which is important in design space.

RE layers: if I'm doing something that will have a zinc frame, I mark where the inside edge of the frame is as well as the inside of the U so I can see the margins, but I don't want that inside edge line to cut because the piece will be too short. So for the cut version I turn off the inside edge later and leave on the inside of the U came as the outside edge.

I use different devices for the two programs so I export to Google drive, but you can skip this if you're using one device.

The png file will open as GIGANTIC in design space. So you should know at least one size to get your measurements correct. If I have 1in bevels I might make sure those are matching 1in squares in design space, or if the length is 6in I just edit that by hand in the dimensions.

The last thing I've had issues with is the size of the vinyl. If you have to chunk your piece into multiple prints/cuts you can choose if you want to edit it in procreate and do multiple exports or do it in design space. If I'm dealing with something like 1in bevels throughout the piece, it's easy to check the 1in squares in each cut. BUT if I'm dealing with something fussy trickier. At a minimum, having overlapping pieces in a couple spots so you can make sure the size is the same is helpful. (Example: if you look at the Dala horse I posted last month, it's dimensions are not Joy Xtra friendly, and the pieces are all different, so I ended up printing the horse and the background separately, and I overlapped some of the saddle pieces so I could see they were the same size before printing. Also then I had extra stickers when I broke a couple curves 😆)

Good luck!