If you can't decide between having a baby and getting into teaching then you should have a baby.
You don't sound at all enthusiastic about teaching, it almost sounds like you saw a advert for the bursaries and then decided that you wanted to do it.
Also, contrary to both common sense and current news articles, it is not as easy as you think to get onto a teacher training course.
In fact, even though the Government are desperately trying to recruit more trainee teachers, many applicants are rejected even though they meet all of the requirements to start the course.
In terms of applying for a place on a teacher training course, it might be a good idea to think about these questions and then you might get some more specific advice from other posters:
What subject were you thinking of teaching?
What subject is your degree in and what classification did you get?
Did you want to do teacher training at a university, through a SCITT program (school based training) or through School Direct?
(These are the three main routes to train as a teacher but there are several others as well)