Ask your boss if you can take stuff home to wire up and play with, if he is a good boss he should be impressed.(If he isnt he isnt a good boss) I learned loads at home on with old panels that I had removed to update, as well as new panels that I was installing. There is nothing like it for gaining confidence in how to program panels and how to wire them etc. Make sure you have the engineers manual for any old panels that you take home, as the programming is not the same as the ones you currently install.
Well done for finding here and asking, many young lads/lass's wont have the initiative to do that, you are obviously keen, stick around we will help where we can.