I will be glad if you can tell me the
altitude of mcm helo during any kind of operation. Does the altitude
differ due to the type of operation or is there a fixed altitude? And
also I want to learn tactical details

(1) enlist and get a clearance and work in this field.

or (2) get a commission, get a clearance, and work in this field.

or (3) explain why you would need this info?