Welcome! There's quite a few Cummins guys on here.
We've created a "team" that you can join here:
EcoModder Team Competition
There's no real benefit per se to being on the team, but it'll give you a quick way to kepp an eye on other folks with the same type of truck.
Go ahead and start a fuel log too. That's the biggest thing that you can do to start improving fuel economy--start keeping track of it.