@LBoogie
First, there are no dumb questions on this forum. Each and every one of us either came up through the ranks of working on cars since we were (pre-)teens, or we are new to all this and learning from those more experienced by asking questions. Please don’t apologize for trying to learn how to do the right thing.
Second, I apologize for not remembering that Greg is building new cars with rear disk brakes (give me some slack - I’m OLD). As soon as I saw that I slapped myself side the head and thought, “$#!+, Yeah! Rear Disks”! Then it all made sense. It takes a while to “bed in” the rear brakes, because when you stop, 80% of your stopping power is in the front brakes, so the rears don’t get as hot as fast and take longer to “wear in”. It might take a month or more, depending on how hard you drive. It’s kind of like baking a cake, and your rear brake pads aren’t “cooked” yet.
The “mechanic approved” way to speed up the “wearing in” process is to get the car up to 45-50mph on an open road, step on the brake pedal until you feel it nicely dragging, give it some more gas (still holding the brake pedal) to recover your speed and then hold both of them for 20-30 seconds (just count in your head). Let the brake off for 30 seconds and repeat the process four times. There is some finesse involved, but not much.
If you feel that is intimidating and don’t want to go through all that (I’m being nice - You don’t want to consciously break anything, either), then just live with it for a month or so and your brakes will bed in all by themselves. Even then, with rear disk brakes it might take a very strong pull on the handle to get the rears to hold securely, but they should, eventually.