Is AAT the best route to accountancy?

Hi all, new member on here so apologies if I ask any stupid questions.

I'm 31 and want to become an accountant. I currently work for a car finance broker and only have GCSE qualifications so am wondering what the best route into this field would be? I would obviously, in time, like to become fully qualified so can somebody please outline the process and timelines if at all possible?

Many thanks,

Mike