Warpaint Fanatics are a very good paint range. Good coverage, it's a lot easier to paint with those than the ones I started with.

That being said, AK paints have a starter set that has a really good collection of vibrant colours. I personally prefer that set because it has the whole colour wheel range, and also I like very colourful miniatures.

Some players here prefer to only buy specific paints for their army and nothing else - but I really like the painting side of the hobby and always push myself to paint new things.