Strategy for level 1

Hello, I am level I candidate, I had given exam in may 23 but was not able to pass. I had prepared for approx 6 months full time so, I wanted to know what i did wrong why i failed? Any suggestion by you on what i should do I had used schweser for prep and I had not used anything else I did self study and was not able to complete syllabus so i skipped approx 10 readings and was not able to give mock because of lack of time. I was facing a problem of forgetting things especially formula & concepts that i had studied very well earlier what are your suggestions for me. Should i stop using kaplan is there any easy alternative? What strategy you recommend to me because i am little confused. I am targeting may 24 exam again