PGCE will be tough, as will your NQT/RQT years. After that it gets better.
A typical day for me, would be in school for 7.30am, check emails and respond to any urgent ones, flag anything for my to do list.
Double check lessons for the day and print the resources. Try and get a little bit of planning in or marking.
Tutor group first, usually half an hour of reading/current affairs discussion/PSHE and dealing with uniform/missing equipment/pastoral issues that have arisen since the day/week before. I also have conversations with students about any negative behaviour reports they got from the last time I saw them and praise those with positives.
Lessons are in double blocks, some are singles, some are doubles (45/90 minutes) 1&2, 15 min break (time to pee, refill water bottle and get to the next room)
3&4, take students down for handwashing, 45 min lunch. I like to have lunch in the staff room but not possible now. I usually plan and mark during lunch time, usually A level homework and essays rather than books, which take longer. Then teach 5&6. I don't teach all day every day but I am a head of department so I get more time for HOD duties. I have 5 break/lunch duties a week and run A level intervention for an hour after school once a week.
We usually have some sort of meeting after school on a Wednesday, either year teams, department meetings or teaching and learning briefings. We also have a briefing every monday morning that lasts about half an hour.
From 3-5pm on days without meetings, I plan and mark. I also have to log behavioral reports, fill out feedback forms on record, update mark books, teaching plans for the half term/term/year, set and mark homework once a week for each class, follow up with missed homework, ring parents to discuss concerns or detentions, have restorative conversations with students in detention.
I love teaching but it's a demanding and often thankless job. I could easily stay until 7pm every night but I pick my DD up so I have to leave. I plan and mark on the weekends sometimes and evenings. The work is never finished. Happy to answer any specific questions you have.