I have provisionally passed my CISSP exam. I would say the thing that helped me most was getting my Security +1st. After that, I studied for a month and a half and took the test. All I did was use the OSG and take practice tests. LearnZ was helpful as well. The test was pretty difficult for me, because I experienced questions that had content I've never seen before so I just made educated guesses. I actually thought I failed when the test cut off at 100 lol. Needless to say, I was very surprised to find out I passed. So to anyone feeling discouraged, understand that you can do this! I have no IT or cyber security experience. I'm probably the least qualified person in this group (not joking), and I passed. I hope this encouraged to someone.