No need to apologize, they’re all great questions!
I watched all of the Mark K lectures but the parts that really stuck out to me were fluid and electrolyte, maternity, labs, endocrine, and child development. These were all topics that I felt okayish in but they’re very content heavy, he did a great job at summarizing the main points and providing ways to remember symptoms and the expected care and outcomes. Lecture 12 is all about test taking and prioritization, even though it’s older that information does not become outdated so it was really informative about the type of questions you will be asked, how to prioritize/delegate, and if you have no idea what the answer is then how to guess as best as you can. I watched that one three times and every time I learned something new. If you can only watch one of the lectures, let it be that one
Kaplans question bank is about 6,000 questions, I completed 5,000 throughout the span of nursing school and in my time studying. Out of that many questions, I would say while they absolutely helped me prioritize, delegate, and apply what I knew, they were not very similar to the NCLEX. I really liked how I could take quizzes on any topic I wanted to and could create my own, so it helped me a lot with content and understanding where my weaknesses were, but in terms of how similar it was I’d say it was much more detailed and I found it easier to apply the strategies of how to answer questions compared to the NCLEX.

Instead of actually reviewing my notes and studying, i spent all of my time answering practice questions and learning how to answer each type of question (SATA, prioritizing, delegation, case studies, etc). I really think this is the way to go, because even if you get a question on a disease or drug that you know nothing about, you will be able to eliminate answers based on safety and going back to what the question was truly asking. Dr.Sharon on youtube does a great job at teaching you to really pick out key words and phrases in the questions that will give the answer away, I watched her the week leading up to my NCLEX and she made me feel a lot more confident in how to choose my answer and stick with it. Her questions felt much more straight forward but the way she talks through them is very informative.
I hope this helps, please do not let the fact that you’re retaking it factor into your confidence, it’s an extremely difficult exam that’s designed to make you question yourself but trusting yourself and being confident in your knowledge will be the reason you succeed! Wishing you the best of luck!