Outstanding glade to here it driver! I'm telling you from a guy who has hauled it all in the tanker world, its about as good as it gets. For our guys who came from freight or some other non tanker job, I tell them they don't know how lucky they are to have cryo as first tanker experience.
I'd say most guys pick up on the trailer side of the delivery right away, it's the customer tanks that can very. From valve layout, pressure sensitivity, unloading practices and special paperwork requirements. Take your time and get it down pat, and even then you will get to customers you've never been to that have some funky stuff.