I looked at many of the sample questions. Breezed right through the technical ones (related to Elec Engr). Probably won't even need to review there, it was all very simple stuff.
The questions on rules and regs would take a little study. Many questions were pretty obvious and one could guess their way through them. But things like "Which agency does this?" would require learning, since that's all brand new to me. Also, "Which band is this frequency on?" would take a little study. There were also a few questions that fit into the oddball, "Why would they ask this?" category. Reminded me of some that popped up on my test when I transferred my Paramedic from Texas to Colorado. "What is the minimum ground clearance of an ambulance?" Huh? I ride in the back of them, I don't build them!
I breezed through the technical questions, and I'm a software engineer that dabbles in electronics. I only had a hard time when I got to Extra, but even that should be pretty easy for you.
Yes, the bands and the regulations are the tough part. The oddball ones that seem so arbitrary are a tiny part of the arbitrary things that are known. I think what they do is give you a taste that those sort of things need to be thought about, so you know to look them up when you need it. Like, that different antennas do different things.
You might also consider joining a radio club. The reason there are a lot of tests is there are a lot of clubs, with different focuses. I joined the nearest one to me, and I've been having a lot of fun.