From your questions I think you definitely need to get onto a school.
You take the same lunch “break” as your children - I work 3/4 of it trying to mark a set of books and take about 15 mins to eat. Of course there’s microwave access. Some people take the full hour but take all of their marking home.
My typical day (as somebody 14 years in):
7.45 - Arrive at school, print things for 5 lessons (English, Maths, Phonics, Topic, Reading) and start sticking in books. Each lesson would be tweaked three different ways for lower/middle/high ability children all its a bit like planning 15 lessons or activities per day.
Get powerpoints and other resources ready on the interactive board/out on tables.
Talk to TA about what they will be doing with their groups during the day.
Write date and spellings up on the whiteboard.
Get everything ready for 1:1 readers that we do every morning.
Probably answer a few questions from other staff.
9.00am Children start. Listen to readers and change books while they do spelling. Start English lesson (grammar starter for 10 mins, main lesson teach, children application activity in books)
10.15 - Playtime (on duty - swap with TA for 1 min for a loo trip)
10.30 Phonics session
10.45 Maths session (10 min starter, main teach, application task). Change the lesson completely half way through when they don’t get it. Run around between groups like a mad head trying to make sure the lower ability get it, and the higher ability are stretched.
12.00 lunch. Try to mark one set of books. Set an improvement task for each child related to the lesson. Grab 15 mins to eat and go to the loo.
12.50 - Topic lesson (as above lessons)
2pm - Playtime (as above)
2.15 - Reading lesson
3.00 - Assembly (On a rota to deliver these for the whole school)
3.15 - hometime, field questions from parents whilst monitoring who is collecting each child, passing on first aid and other messages, keeping other children calm and quiet.
3.30- One day a week staff meeting until 4.30/5 (On these days all of the marking has to come home)
Other days, mark remaining books (takes 1-2 hours depending on what we’ve done. Writing lessons take much longer) until about 5pm.
Realistically after school time is taken up a LOT with other little jobs (data input, assessment, subject leadership tasks, replying to emails, meetings about various things, parent meetings or phone calls, paperwork for SEND children) so you do end up taking marking home. Also starting to set up for the next day to make the morning less frantic.
In the evenings I catch up on marking and other email admin and tweak my planning BUT I have been in Year 2 in the same school for 8 years so I am only editing and improving my planning, not starting from scratch. When you are new planning is a HUGE chunk of your time and a lesson has to show different lesson parts, differentiation for different groups of learners (sometimes including a SEN child who needs individual work), be engaging and visual, have supportive resources, have good pace and productivity outcomes, focus on presentation and high standards. SO much goes into a good lesson - it is not just download a PowerPoint and pick up and teach from a textbook. Expect to spend every evening planning fairly late into the night until you are well established in a school. It’s not unusual for my teaching students to work until 11pm and we aren’t a particularly demanding school in terms of paperwork - it just takes that long to prepare all of the resources and structure the lessons for 5 lessons per day.
It really does get significantly easier after a few years but be prepared for hard graft, long hours and a lot of scrutiny in your first few years. You get used to people watching you.
Behaviour management and presence is key but you can train yourself to fake it until you make it with this. It’s absolutely crucial you do it from the get go though or even the little ones will walk all over you.
It’s an incredibly rewarding and unique job, but it is HARD and the hours are LONG. Holidays are great but when you are new a lot is spent catching up on work, preparing your classroom and trying to get ahead of yourself for the coming term.
Hope that helps give a little insight.