-- I find reputed practice exams, for AWS TutorialsDojo is reputed on, similarly there would be something for Azure, I am sure.
-- Try 1-2 practice exams after my initial study, and see where I stand. Go through all the answers and their explanations and understand if my understanding of the concept is right or not. If not, take quick-short-to-the-point-notes about that one particular thing and move on.
-- Study notes, and fill the gaps, and give tests again. Repeat
After a certain iterations of this, you'll see pattern emerging in at least practice tests. These certifications rely on you knowing "A VERY PARTICULAR THING ABOUT X TECH, WHICH THEY MADE". So study the exams in this fashion, and once you are prepared with all the key-notes, sit for a final test exam and see where you stand.
At least this works for me, I am not sure how you actually learn you content, but a suggestion.
Just to illustrate, when I took that AWS exam about 2 years ago, even studying to that level, the actual exam felt hard. I was honestly unsure if I'd passed or not, right up until the moment I clicked the "submit" button. It turns out I did pass comfortably, but if I'd slacked off on my studying at all, compared to what I actually did, I would likely have failed.
So yeah... my take is, make sure you have access to some quality practice tests (lots of certifications have plenty of practice exams on Udemy), take them over and over again, and don't go for the real test until the practice tests are downright easy. If you do that and still fail... erm, I dunno. Maybe visit a doctor and see if you have an underlying medical condition like ADHD or something else that could affect your test taking?