It's not unusual for shops to just concentrate on jobs that pay the rent, as long as you're competent at the job they need you to do they're probably not too worried about increasing your skills.
You however should be and it's awesome that you're here participating in this forum. The metals we work with are an amazing resource on this planet and figuring out how to make them do what you want is the essence of all engineering. So, go ahead and try to forge weld steel into a block. Then cut it open and see what you find, then do it again. You will certainly learn something even if you never get a piece that's usable for anything more than a paperweight.
But, talk to the bosses about access to the off cuts. That's where I get most of my material.
Cheers,
John