Well, I think you need to study CSS a little, but I use a WYSWYG editor known as KompoZer, and I put out a real simple minded tutorial that that creates a tableless design (http://www.weblitesites.com/usingkompozer.html).
I would reccomend GretTutor sites (http://www.gregtutor.plus.com/) for good tutorials, at least one of which concentrates on tableless design (he uses KompoZer as well).