I think certifications can be overwhelming if you haven't done them before. I've found it helpful to accept that you will feel checked with some practice tests. It's a feeling you get used to. Because the more you do those tests, you'll star seeing patterns in the questions. My advise is repetition. Just keep doing more of what you're doing. Read. Test. Read Test. If you wanted to add some videos into the mix, I've found Professor Messer a great resource on youtube. I ran through his videos back when I was studying for Security+. He breaks down the content well and is also thorough.
