To be fair, I leave at 3.30 every day (get in at 7.25) and rarely mark at home. But I have been teaching a lot of years. The expectation on teachers now is huge compared with when I qualified.
Despite managing my workload really well, I am still utterly exhausted by the end of a half term. This goes within a few days of breaking up so it is definitely teaching that saps me. I am asleep in an armchair by 8pm most nights (which makes parents' evening interesting!). It's a constant performance and lots of scrutiny.
I am bit gobsmacked at the attitude upthread that 7.30 - 6pm days in any job are somehow seen as not worthy of a raised eyebrow in this country. That's a minimum 50 hour week, well in excess of various 'norms' and directives across Europe.
Bear in mind OP that lunchtime in the state sector is about 35 minutes and manic. It's just not the same kind of job as any others- it's fairly unique . We aren't really treated like grown ups!! Very little autonomy, which a lot of career changers find bizarre.
I like teaching because it keeps my brain ticking over. I like learning new stuff, planning and actively enjoy marking work ! Lots of people don't and get a shock. It helps that I love the subject I teach. Some of my colleagues are forced to teach random other stuff to fill timetables (RS, workskills, LS, cookery...) and this is a huge cause of stress. I have never known so many MH absences as this year.
Don't just go and be a teacher in any old thing because of a bursary - you'll feel unmoored, unspecialised, deskilled- and you might hate it. You will also probably not get, for example, sixth form teaching for a while.