It's looking like it will be pretty basic, since Will Wright is in charge, and he's big on getting as many people able to play his games as possible. As far as complicated... well, it's a Sims game. If you've played the first one, you'll be fine. I've played both previous ones and love them both.
I remember my first successful family was one that actually had a single guy created by me falling for a mom and daughter that my sister created. That was fun, because then we played the family together. They actually did very well, had another daughter together, and were able to get into the biggest house in the neighborhood. *WITHOUT CHEATS* Sadly, though, the wife ended up dying in a tragic grilling accident. *tear*