Leah has nearly the same coloring as Chewy, tan and silver! NICE!
I have not yet trimmed him myself, as I didn't have hte heart to use that noose thing that groomers use, and I didn't have him trained well enough to let me do it without some kind of restraint. Now, I will probably do it myself.
I'd say that clippers with a #2 guard would be the way to go for the body. #1 guard if you are feeling bold!
Consider using scisors to trim the bangs and area around the face into a pleasing shape (and out of the field of vision). You may want to do some fake trimming sessions first to get your pup used to scisors in face. You want to be careful to acciedentally poke them in the eye