Using the pen tool in Illustrator is, at least I find, a more intuitive process than in Photoshop, that said, I still like Photoshop for brushes, and filters and cleaning up drawings and the rest.
We learned how to group things in Illustrator in groups that we could later go into and modify, and then learned how to place things made in Illustrator into Photoshop - using placement, and or dropping. Depending if you leave it, your placed object or illustration, as a vector or not within Photoshop, will change the quality of the image. Vectors having a much higher quality line.
I am feeling for sure a lot less intimidated now by Illustrator, and am excited to learn more.
The image below was of a frog, traced and colored in Illustrator and then placed in Photoshop with a background and text. A duplicate frog was created in photoshop, and played around with using brushes and filters, and this frog was clipped into the original frog from Illustrator
