You may want to just sign up for barbri. You are probably going to have to take it anyway, so you might just want to suck it up and get it over with. Its only like 150 or so for the deposit.
I took the barbri prep class (3-4 hours) then read through the barbri book and did some practice. Spend a total of about 8-10 hours total (class and studying outside of class). Ended up with a 117. Definitely put in too much effort (30 points worth). It is a pretty simple exam although I have friends that graduated top of the class (top 5% or so, law review, Vault firm, etc) that only passed by 1 point. Doesnt hurt to over prepare but dont kill yourself either.