For each abbreviation, try to head-copy it. First, it is sent three times in Morse code. Then it is spoken. And finally, it is sent again in Morse code. If you missed it the first time when it was sent, the second time allows you an opportunity to learn the abbreviation.

Ideally, you will hear the abbreviation in your inner voice as it is spoken as opposed to the abbreviation as a series of characters. Mental translations take time, and it will save you mental effort later on.

73 de AD0WE!