# The Lord Yahweh has given me a tongue as one of those who are taught

"The Lord Yahweh has enabled me to be a skillful speaker" or 2) Yahweh has taught him what to say. Alternate translation: "The Lord Yahweh has enabled me to speak what he has taught me" 

# he awakens my ear to hear

"he has enabled me to understand what he says" 

# like those who are taught

The servant compares himself with a student who learns from his teacher. Possible meanings are 1) "like one who learns from his teacher" or 2) "like one whom he has taught"