Warning This Unity Package has Package Manager dependencies - do I skip or install/upgrade?

I am taking the Create with Code live course. We are using 2018.4 for the tutorial. When I try to import the assets, I get Warning This Unity Package has Package Manager dependencies. I have the option to skip or upgrade. I've been sitting on this screen for 4 hours because I have no clue and haven't gotten an answer anywhere else. This is for the driving simulation tutorial. I am tied up for the next few days and was hoping to do this today, so I really hope someone has the correct answer! I asked on the group forum and got one vote for install and one for skip, so I'm hoping someone here has a definitive answer. Bonus if you can tell me WHY I'm clicking one or the other!