Welcome.
Thank you for your service.
I had the same idea as you, build the models of the vehicles I rode in while serving. So far I've built three planes for my uncle, a Vietnam Vet, and getting ready to build a sub for my father who served on subs during Vietnam era. I have purchased the models of my vehicles, so they're standing by.
You've come to the right place for tips, techniques and motivation. Above all else, have fun.