I'm 21, we used a fertiltiy clinic and got "you're so young to want to have a baby..." but they do respect that its whenever you're ready, not when people are ready to accept you being a young (or older) mum. There isn't any one age. For some people they aren't ready until 30, or 40 even... some are ready at 20.
But it sounds like you anyway. Just wanted to add there is a young mums board you can chat in if you have any questions and stuff.