Need help starting CUET prep from zero + guidance for getting into DU/BHU BSc

Hi! I’m planning to prepare for CUET now as a backup option for BSc admissions. I’m starting completely from zero and I’m really confused about a few things. It would be great if seniors or anyone with experience could guide me.

What subjects should I choose for CUET if I want to get into DU or BHU for BSc?

How should I start studying from scratch? Any proper study plan for beginners?

Which books are best for: • English • General Aptitude Test (GAT)

For those who’ve given both CUET and NEET, how difficult is the CUET-level: • Physics • Biology • Chemistry

How much do I need to score in each subject (approx) to get a good chance at DU main campus or BHU main campus for BSc?

Any advice, tips, or book recommendations would help a lot. I’m starting late, so I want to study smartly. Thank you!