I am full time 120 credits a year and get the £267 payment once a year. I only pay a small amount towards my degree myself.
Student loans have no interest as I know off.
You do TMA's to be handed in every 2 - 3 months and then sit final exams at a local college.
Plus you have online tests called ICMA's through the duration of your modules.
No, your tutors change per module.
Sounds like you should just phone the OU and ask. They normally will phone you anyway before your course starts.