On finding the right neck strap
Go for a Y neck strap, and not for neck straps that are narrow and or have a cushion.
The strap needs to be adjusted to that the mouthpiece is in line with your mouth, not too high or not too low, so you don’t have to manipulate your body to put the mouthpiece into your mouth.
Also make sure the next strap is in a comfortable spot – Be sure to stretch before you play! (it is quite a weight on your shoulders- make sure that you also have good support and posture).
it is important that the strap is taking the weight of the saxophone and not your hands.
On holding the saxophone
Reference: Corey Randles
Start with the Right hand thumb hold (underneath ) then the Left Hand thumb underneath the top button.
The saxophone should be held either to the right of your body or in front of your body. (when sitting, it’s easier for the saxophone to be to the right of your body. )
Alto Saxophone basics 