Be hungry to learn. Soak up as much as you can. Observe and if you journal - note down what you're learning.
Ask questions, don't be shy.
Volunteer to shadow folks, most people are happy to coach but are never asked.
Do the hard yards. No substitute for going through the grind early in career. 70 hrs is a bit much, but put in the focussed 40/50 hrs a week.
Spend on yourself. Its your first experience of financial freedom so start accumulating experiences - go out with friends, road trips, etc. Don't get bogged down with the need to save a lot. Save some, and treat yourself right.