Advice
Have a basic understanding of 3 phase systems, transformers, power factor, and motors. It does not have to be super in depth, but just know what they are.
After being taught something on a certain software, write instructions for yourself on a notepad so that you do not forget it. Make this a different color than anything else on your notepad so you can reference it easily.
Bring headphones to work, but mute your music when anybody is talking on the phone. They are most likely speaking with clients and you can gain valuable knowledge from hearing them interact.
Try to wrestle and struggle with a problem for about 10 minutes before asking for help. Also, do not be afraid to ask for help.