Nervous about starting a new job

[Razor]

I got a job working for the military, its been a while since I been back in the rat race, I was working on few projects of my own but now I think its time to learn some new skills. Im going to be a Engineering Tech working on Diesel engines for the military. Its kinda dream job for me because I wanted to be back working with the military and lot of my friends work there as well. Thing is im kinda nervous, been keeping me up at night, I'm pretty sure Im making the right move here, they offered me a great job and great pay with full benefits, but I dont know why I have the jitters about it.. can anyone relate?