If you ask me, the best/honest advise I can give you is that, DO NOT waste your time on CELPIP. I have taken both CELPIP and IELTS. Celpip twice - Ielts twice. On both the occasions of celpip, they gave me an 8 in W first, then 8 in S on second attempt, while I achieved top bands (12,11,12) in all other sections (RLS, RLW). My first attempt in IELTS...unprepared, I got great scores except in W because I used CELPIP format. On my 2nd attempt, with prep, I achieved 9, 8.5, 9 & 7.5 (LRSW).
Go for IELTS, get an online tutor if you could, practice as much as you can and it will be easy. I may be wrong, but it seems like CELPIP is designed to fail you on purpose, so that they can keep milking money from your next attempt.