Andy, Good Luck!!!! After 33 years..... it's STILL intimidating in spots, don't figure it will ever change, at least, I hope it doesn't, keeps it kinda interesting.
Echo the "first years are the toughest/best/most rewarding" theory, the foundation for what you will be you are laying now.
SO PAY ATTENTION!!!!!
Lotsa truth in the mechanical aptitude remark, guys that are all thumbs we make foreman/supervisors/inspectors..... uh, hey wait a minute.... STRIKE that last remark