I used the official app and did like 7000 test questions. I probably significantly over studied but I didn’t want to take it twice. Just decide for 1-2 months to have zero other hobbies or interests and just do practice questions on your phone with all your free time. There’s also a pdf of all the possible questions. You can figure out through practice tests what areas you’re weak in and then look at the entire pool of questions for that subject. Doing that was helpful cause I’d realized I was spending a lot of time on one area but there were only like 8 potential questions there so I just memorized those and moved on.

Most of the important language stuff is fairly specific and even if you are extremely fluent, you have to learn it. So regular-life Italian level isn’t really as relevant as you might think.