My advice, as someone who fell pregnant at 16, wait.
If you want a baby, I recommend getting on the housing ladder, and seriously thinking about what other things you want out of life.
Like learning to drive, travelling to a few places with your boyfriend.
Have a little bit of a life for yourself first.
Renting, whilst having children can be quite scary, given the lack of stability. I know some people who through no fault of their own are moved on every 6 months or year.
Having a baby is a really beautiful experience, and motherhood is my favourite thing I've ever embarked on, but I wish I would have waited so I could have provided a little bit better for DD in her early years.
Really though, enjoy some of your life whilst you're young. Enjoy having a few years of money to yourself and freedom to sleep when you want before your needs come second after a babies.
I know a lot of women my age (33) who had their first at 17/18, and are still having babies into their 30s, and its quite sad to realise we will spend most of our lives wrapped up in motherhood, without knowing what it was to just think of ourselves.