any single mums here to give some advice.

So I'm currently pregnant at 18. I only get £600 a month from my job and I live with my mum and family in a three bedroom place. I don't know how I'm gonna afford it all. Like should I move in my nan which she has two spare bedrooms and lives near by. Also is there ways to save money on nursery stuff for the baby because I want what's best for my little one but I'd rather not struggling with money.