u can address yourself by "Tôi". It is formal

ur name sounds like "morph". It means "hình tố" in Vietnamese ô_ô

I come from Viet nam, and learning english, I think "ađress" is địa chỉ

Hey, thank you for your feedback. I am familiar with 1 vs 1 situations. However lets say I talk with two people. One is older and one is younger than me - what now? :D I guess I will go with "minh" in that case from now on.

It depends on who do you want to talk to. So who do you want to talk to? :)