Marc,
I do hope you understand what a relief it is to us to see someone approach the situation:
A- With eyes wide open
B- A proper attitude to make it right
As to diesels, they tend to be maintenance fussy, but otherwise forgiving. Keep the fuel clean and the lube oil up and they will take care of you. The big bozo nono is running it out of fuel. The injection system is very pressure dependent. Cummins engines used to be better about this than many, but they still don't like it. So, learn to change fuel filters (always carry a set) and how to re-prime the system when you do.
Enjoy the journey.
Matt - a lifelong waterman and big engine guy