Hii,i am here to help you according to your query.Amrita, Coimbatore is a good place of study for Aerospace and they have good infrastructure. I did not study in Amrita, but I did study Aeronautical Engineering in Coimbatore. As far as I know, it has got a good reputation and also the placement record is good compared to other private deemed universities.

So, if you are genuinely interested go for it. Regarding the average salary, I dont have an info on that. But, perform well in the academics and be rest assured about your placements.