I know NOTHING about sewing machines, except that I got on really badly with them at school. 
But I really want to get into sewing as there are loads of things I want to make.
What do I need to consider before buying? Do I just go for the most expensive I can afford, or one with the most features? I guess I would be more likely to buy a brand I have heard of, e.g. Singer, Brother. I really am a total newbie, so any advice would be useful! I've had a look at them on the net, but it's not really helping.
Thank you!