Indian ringnecks make excellent pets. We hand raised ours from 18 day old chicks . That seems to be the best way to ensure that they will be tame with you and not nervous. i find your next question somewhat unusual! I have never held them upside down!! They are extremely intelligent birds and learn very quickly. Our male is a great talker and he has picked up my laugh.
I am finding the indian ringneck forum very informative and there is some excellent info on there. Have a browse on there. There are loads of pics too.