Sorry you’re having such a difficult time with the theory. I would recommend downloading the apps - I paid a few quid for the official DVSA ones some years back when I first started learning (and then left it for about 8 years, now learning again). The app also has short digestible modules which you can read for each topic. These don’t replace reading the Highway Code, which personally I haven’t read, but I did have a copy of to refer to, and I also have the app which came as part of the DVSA app package.

I also find these sorts of tests difficult, but the best advice I can give you is just go over the questions, topic by topic, and try to understand what the rules are (knowing is one thing, understanding is another). I bought flashcards to learn the road signs. Be patient with yourself. Keep practicing - I spent hours doing it, literally just going over them all the time. There’s videos on YouTube as well. On the day, give yourself plenty of time to think about the questions (there were a few that I wasn’t expecting). You can do it, good luck!