Core 1 is indeed hardware-focused. Things like different display types such as Twisted Nematic, In-Plane Switching and Vertical Alignment, RAM pin counts, types and speeds, HDD types (SSD, HDD, hybrid) and speeds (7200 RPM, etc.), and Core 2 is software-focused, like Windows troubleshooting, macOS, some Linux, etc.
One thing I would do is go through the objectives and make flash cards for the memory-based things like RAM pin numbers, RAM speeds, hard drive speeds, etc.
My suggestion would be to check out Professor Messer's YouTube channel. His A+ series is outstanding, and maybe even check out an Exam Cram book. I have one by David L. Prowse, and it outlines just what you need to know to pass the exams. If you're looking for an A+ book, I suggest Mike Meyers' 220-1101/220-1102 Study Guide. He breaks down the objectives into easily-explainable subjects. Also, if you want, Udemy has a Mike Meyers A+ 1101/1102 video series that's relatively cheap (about $15 each).
One thing I've heard a lot of people who have nailed certification exams say is when you're studying, try teaching the subject to someone. If you can teach it, you understand it!
Lastly, try a practice exam (90+ questions is ideal), and time yourself. Give yourself the 90-minutes allotted in the exam, and see how you do. Get used to being under the gun of that 90 minutes at home so you can learn to relax when you're in the thick of it, doing the real deal.
Good luck!