SBLSBL second attempt

Hello Previously I have attempted SBL in Mar 2021 but was unable to clear it (failed at 37). I am confused to how should i approach SBL again. Should i do exam kit? as in march 2021 attempt i did not attempt the exam kit. Or should i stick to past papers only? Any help from students who cleared SBL in more then 1 attempts will be appriciated. Thankyou