Setting up on a software platform is bound to look intimidating if you just read about it, because the whole thing is completely abstract.
I think that if you simply plunge in and do it, and count on the excellent help which this forum often provides, then you will find it easy.
Hopefully you have a free google apps account (i.e. an account opened before they started charging) and then you will be fine.
But if not, the situation may be rather dire. The paid version of google apps is not just overpriced, it is overpriced by an order of magnitude. It is $50 per year per user which, if you only want to use the webmail part of the suite, is absurd.
I keep thinking a competitor ought to spring up and offer “webmail-for-your-domain” for a fraction of the price. I think such a competitor could do very well.
Alternatively, have you considered getting 10 free gmail addresses for your 10 users?
How can having one’s domain name be part of one’s email address be worth $500 a year for 10 users?
Just as a further thought, you could, as another alternative, take over a free google apps account from a friend who doesn’t need it any more, and attach your domain to it as a domain alias.
There could even be an unofficial market for unused free google apps accounts.