Loads: shoot what you like and see if the gun agrees. Mine likes what I like
Breaking in: shoot what you like
Cleaning; clean it well prior to shooting.
I am not so meticulous cleaning my shotguns, but it's not hard. I like one of those rigid fuzzy cleaners - i put solvent on it and run it thru a bunch then clean it with degreaser, use the bronze brush and do it again until it doesnt pick up much fowling then switch to patchs
Chokes: I have cyl, skeet, imp cyl, mod, mod imp, full, steel full
My rule is to use a more open choke than I think I need. So cyl or skeet for skeet, imp mod (or imp) for trap, mod for steel waterfowl and tunsten waterfowl. Imp for upland and rabbits.
Hunting: tungsten matrix for waterfowl, lead 4s for upland, 8s for skeet and trap 7.5 for clays
Enjoy