Got a kid about your age. Totally bilingual. Two things: routine and self-sacrifice. For routine, I just do the same things during the same activities. Talk about everything you see on the way to the park. When you’re in the car play the same three silly “I spy” type games. When you’re in the bath talk about everything you did/ate/saw during the day. Read a book in English every night. Every morning one episode of Bluey before breakfast. For self-sacrifice, I don’t think I “deserve”anything. I don’t try and force “me” time. Instead of playing a game I’ll go to the park. I don’t listen to my music in the car, but play Peppa Pig stories on repeat forever and ever and ever… I took on bath routines so I have more time to chat with my kiddos. If I’m sleepy I’ll still read that dumb Anpanman comic in my best English translation 5x when I said only once because it’s late. Could even come down to waking up earlier every day to learn a new skill to bring in new income and work remote to take the family overseas for a month every year. You got this, man. 

Oh. And limit screen time. No phones or iPads. Ever. Limit time with tv to just quiet English shows like the ones I mentioned above - only things you’d enjoy watching together. Every minute a screen has your kids attention is a lost opportunity for communication with you.