Good idea. A course is thfire st thing to do. Also if you have any dosh left over, see if you can get the tyres swapped out while they're brand new.
IMHO you are best doing no other mods to the vehicle for 3 - 4 months, take your time and see if there are any niggles in the car. Then do accessories one or two at a time, adding to the capability. You really don't save much doing everything at once.
Too many times I have seen ( here and elsewhere) where people get all the mods in one go, then when something goes wrong no one knows what the problem is.
Enjoy your Triton.