I want to dip my toe into the field of Panorama photography.

The gear I have available is Cannon 6D + Sigma 15mm fisheye.

I am thinking of going with the NN3 Starter package + Nadir adapter + EZ Leveler II.

Am I missing anything to start with?

Is the NN3 Starter package a good combination with the 6d and 15mm sigma?