I need an advice please..

My boy is gonna be 8 months in few days. He usually wakes up between 6.20-6.50. His first nap is at 9.00-10.30, second nap 13.30-15.00. What time do you think it would be best for bedtime then???

we have a trouble to fall asleep, plus he wakes up a lot during a night. Today he was 4 hours awake before bedtime and it seems like it was too much as he woke up 35 mins later and crying. Not sure how long to let him be awake before bedtime to make falling asleep and sleeping at night a bit easier😣🙈You can share your sleeping schedule if you want 😘