I am a non-practising MW, went back to Nursing after having my children.
Without GCSE's or equivalent you will need to do an access course.
While training to be a Midwife you are expected to follow the same shift patterns as you would when qualified - it is part of the assessment that shows your ability to provide around the clock care. So, you will have to be prepared to work shifts - early, late, and night. Many Maternity Units work long days or long nights which are 12+ hours.
The shifts are on top of all of your written assessments, and continuous assessment of practice while in placements.
I'm going to be totally honest with you - the course is hard work. The hours in placement are long and hard, and you will have to find the time to complete all of your assessments too. You need to be 100% commited to the course, for the 3 year duration, and have really solid childcare arrangements, as the hours required of you can be inflexible.
I've been asked many times about being a MW as it can be perceived to be one of the best careers out. I would always advise that you get some experience of the reality of being a MW before you commit to training as one. As you've just had a baby, you could perhaps look at working as a Maternity Assistant for a while... you would get a feel for working within a Maternity Unit, the hours etc, fulfill the desire to return to work and would also open the door for secondment to training if you still want to go ahead.
Whatever you decide, good luck :)