MASTER PLUMBER 2026

Hi, planning to take master plumber exam this july and I really had no idea where to start. Plan ko sana mag enroll sa Fronteer, is it really worth it to enroll kahit refresher phase na sila? I'm a first taker btw and will file my application soon before deadline. I am working as a Project Engineer and I had free time after work, from 6-10pm. Kakayanin ba to kahit refresher lang?