I failed my first attempt. It was painful (considering it was out-of-pocket) and very discouraging. Also, my employer would not pay for training or testing.
I didn't pay for any expensive resident boot camp or other high value training. What I did do was study available open-source resources... every day at the gym, while on the treadmill, I would view Youtube videos specific to a particular domain. On my commute to and from work, I would listen to podcasts, or youtube/cybrary presentations. I did this for over a year before I felt remotely capable of retesting.
If there is a local ISSA chapter, you could contact them about their boot camps (the one I belong to offers a boot camp that was held over 3 hours, 2 nights a week for 8 weeks).
You are not alone... a lot of people have been 1st time fails...