I passed all three exams in one sitting, between YouTube and online practice tests/free apps, I spent a total of $15 getting my Ham Licenses.
That being said if I where in your situation here’s what I would do: print out the general question bank, take a highlighter and read each question and highlight the correct answer. From now on only look at the correct answers.
Now, Take a Technician practice exam followed by a General practice exam. Do this because that’s what you will do on test day. However, while taking the General exam “no guessing” only answer if you know the answer immediately, skip the ones you don’t know. Get your highlighted General Test bank and cross out the questions you got right without guessing, you don’t need to review those anymore. Review the ones you didn’t answer. (Guessing is only for test day!)
Read the through the highlighted General test bank again, take both practice exams again. Repeat the process, after awhile you’ll start recognizing more correct answers. There are some tricks involving certain topics like math where the test may only include one or two from those areas so skipping them all may not hurt your chances. But you don’t have much time so just brute force it as described above.
(I fully recognized that when I got my Amateur Extra as my first license, that I now had a very huge knowledge gulf between my license class and my ability as a good operator. I’ve been learning like a madman mostly operating in the Technician bands as I learn how to be a “good operator” I can recognize 43 Morse characters now but still trying to copy better and then I’ll start to practice tx cw.)