It means dodo
No. the word ego always means I, never me. "Lord, direct me" would be Domine dirige me.
Dominus is the Latin word for "Lord or master". Domine is the vocative case of that noun in the phrase In te Domine
"Non nobis domine" is latin and means "Not unto us, o Lord" and it is from psalm 115:1. Here is a very rough translation I have put together from what I believe to be one of the original versions in...
"O Lord, the only-begotten Son, . . ."