When you say "Everyone" at the start of an instruction only around half the class will realise that applies to them for at least the first half term. The others will wait to be told individually.
Prepare for a lot of snot from tears/illnesses and a good proportion of children who still don't seem to realise they need a tissue and/or would rather just lick it off their top lip or use their sleeve.
Use "Choose it, use it, put it away" as a mantra for helping keep the environment tidy.
Model language as much as you can e.g. "You need to say, 'Can I have a turn?' (wait for them to repeat to child who has the toy they want) then your friend might not say yes straight away but they could say 'When I'm finished' or 'In a minute'"
Having said all that, the children can be very capable if they're given a chance and love little jobs like taking notes to other teachers, fetching someone you need to read with, sharpening pencils or getting something from a different (but familiar) area of the classroom or school.
As BackforGood says it very much depends on the school but if they allow true play based learning Greg Bottrill's book Can I Go and Play Now is excellent reading. Princesses, Dragons and Helicopter Stories is another good read and an excellent approach with brilliant results if you can find time to squeeze it in to the day.