Yes teacher training is eligible for student loans, I have an undergrad/masters and PhD and started my teacher training last month and got the full student loan entitlement (tuition and maintenance)
definitely recommend doing maths though - then once you have QTS you can apply for jobs teaching economics/business - maths offers the 29k bursary
with the initial teaching training, you can do it via uni or via a SCITT, I chose the SCITT route, which means by week 2 of the course I was in my placement school and absolutely loving it.
Im six weeks in, and I’m already teaching part lessons, its nothing like I imagine and I absolutely adore the students, they are truly the best part of the job.
I am at a sixth form school, so I can observe year 12/13 lessons, and once I’m more confident they are happy for me to teach those lessons too.
any questions you have, more than happy to help and advise where I can!