SEE science padhna is guruba reliable??

SEE 2081 batch here, Maile aile samma SEE science ramrari padhekei chuina because hamro school ma aarko pani boards dinu parne huncha. I’m currently relying on guru ba because the videos are short and understandable. Aba guruba ko videos herera notes padhepugcha ki do I need to go through the course book and solution book manual once too?? Please help sentup is right around the corner..