the question pool thing sounds scarier than it actually is. the real exam only pulls 35 questions from it so you dont need to have every single one memorized perfectly, you just need to get 26 right. what worked for me was using hamstudy.org, just drilling questions every day for like 20-30 minutes. it tracks which ones youre getting wrong and keeps throwing those at you more often. after maybe two weeks i was consistently scoring in the high 80s and 90s on the practice tests and felt pretty ready. the electrical theory stuff, yeah some of it is a little rough if you havent touched it in a while. ohms law shows up a few times and theres some basic stuff about circuits. honestly for the tech exam you dont need to deeply understand it, you kind of just need to recognize the right answer. the ARRL Technician manual is decent if you want actual explanations but some people just grind the question pool and pass fine without it. just depends how you learn i guess.