I was the ultra green FO in a part 91 operation, starting back in January. I was fortunate to be flying with a very experienced CA who sincerely wanted to bring me along.
Starting with the radios, flaps and gear (when I could find the levers, switches, buttons, etc in a timely manner), he kept adding just a little more each time as I caught on. He knew I wanted to learn and do a good job and willing answered my many questions. Eventually he started giving me legs to fly.
For me having a captain that's wants his FO to succeed and grow has been great. It's the attitude that's important. You experienced guys have a great opportunity. I'm guessing most of you will be mentors like my captain has been. Unfortunately there are also a few self important bullies out there. I feel sorry for their FOs.
BTW, we've done FL450 (max. ceiling in the LJ35) where it made sense. Big fuel savings, that's for sure!