michie - Belgium isn't scarey at all . It's an easy place to live - most people speak english, foods are similar, transport is easy, shops are very similar.
I live in Leuven outside of Brussels.
If you live inside of Brussels, you may live in and appartment. It's a big city, good shops and entertainment, but very busy.
Wezembeek-Oppem,Turveren, Everburg are outside of Brussels and are very popular with expats - you can get a great house in these places.
I recommend Brussels Childbirth Trust, someone has already linked you to the website. It's a lifeline for some people, and has playgroups, coffee mornings, nights out, events.
Children from the age of two and a half are entitled to a free nursery school place. The education system is very good.
Health care is also excellent - you need insurance, and I suspect your dh's work will help with sorting this out.
There is a British shop in Everburg called Stonemanor.
If you want to work in the future, there are english speaking jobs around Brussels.
If you live in brussels, you can probably rely on public transport. if you live in a village around Brussels, you may need a car otherwise it can be quite isolating.
Good luck I hope you like this country.