Oh, sorry, yeah, I did read that as you knew HE was seeing a lawyer. Brain transposed the sentence.
I still wouldn't worry about reassuring him. He doesn't need to know what you're doing.
It's possible to represent yourself in a divorce, though with kids and any substantial property/debt it isn't a good idea. But if you don't think he's going to be fighting anything, you might try finding a lawyer willing to advise you and to look over the paperwork you draft. You certainly need to be sure you draft everything correctly, but there are some lawyers willing to help out in this way. Might take some doing to find one, but it's worth looking into. At the very least it might significantly reduce your legal fees. And if he lawyers up, you definitely won't want to be going it alone.