Room to the right is a dormer this ia a part of a the attic that I found mostly un-insulated.

Feel free to ask any questions.

You need to decide if you want the attic space to be conditioned living space or not.

If not, insulate between the attic floor joists and the attic floor with cellulose after air sealing all top plates and openings.

If yes, use spray foam between the roof rafters or 2" foam board over the rafters and then blow cellulose in between the rafters. Drywall over the foam board.

You can get more precise information and answers at www.startinsulating.com/forum