Over the school week we've learned some of the basic tools of Adobe Illustrator. Pen, Line, Eraser, and muslch more. Tools that look familiar in Photoshop work in a total different way; however, and you may need to find a workaround to have the desired effect you were going for. This is because Illustrator as a vector program is better at making things that need to be scaled like logos, whereas Photoshop is better for things like photo editing or drawing.
Overall
Not all tools work exactly like Photoshop
You have to get used to the pen tool
Photoshop edits raster whereas Illustrator edits vector
Sources
https://www.pluralsight.com/blog/creative-professional/whats-difference-photoshop-illustrator