You should check out the guide. It's quite good and they usually keep t updated. To answer your question, check the players section:
hockey.powerplaymanager.c...
You can see a table of the important attributes for each position. Try to build your players with a 2:1:1 ratio. Meaning a d-man would have 50Def and 25Pass & Tech. You should also train Tech for d-men. It'll help cut down on penalties.
That should get you moving in the right direction. Don't hesitate to ask questions. Most people are happy to help