Moving up LO bedtime...help! We’re going in reverse

My LO is 8 weeks old and we’re trying to start moving bedtime up as he’s been falling asleep between 9-10 most nights and then waking up 4 hours later to eat and then every 2-2 1/2 hours after that until around 10AM when he’s up for the day. We need him to be waking up earlier for when I start back to work. How do I get him down earlier at night and up earlier in the morning? I feel like he’s waking up so often because he’s going to bed too late...Any tips would be great!