Gro clock and rules around the time they are allowed to leave their bedrooms. It's fine to wake up early, it's not fine to wake everyone else. Start off at 615 to make it successful, then gradually move the timer to 7. Carrot or stick approach, you know your kids. We did a reward of a small toy if they managed a week to start with.
Eat dinner with them, don't wait til they're in bed, then you get time to yourself once they are asleep.
Your age gap they will play nicely one day, they're slightly too small for it to be for long. 6 and 4 will be a game changer. Hang on in there.
I agree re structured activities at those ages too. Eg morning is TV time, breakfast, colouring, park, then lunch, then paddling pool, lego, jigsaw, dinner, bath, bed.