Help me out ! ON my first reading rn. Will complete my first read by 10th Jan

I am on my first reading and only doing rapid revision from Marrow. Annotating impo. Points +PYQs.

I only have Marrow platform for now.

1. is BTR ESSENTIAL ?
2. should I follow TND or some platform ?!!

-I have joined DAMS boot camp my source is MARROW ( annotated with points ), joined DAMS boot camp to give me a target/ to keep me on line. IDK. Only focusing on my first read and solving PYQs.