How can I establish a routine for me and my son. I feel like I'm just wingin it all day. He has no…

How can I establish a routine for me and my son. I feel like I'm just wingin it all day. He has no definitiw schedule. He eats every 3 hours maybe 4 I don't know when for sure. At night sometimes he sleeps 5 hour stretch sometimes he's waking up every 3 mins you we go upstairs late and settle down at midnight which I'm trying to go up by ten every night and relax earlier. With him having reflux is hard to tell what our night will be like sometimes he's fussy and takes me and hour or so to calm him to sleep. That's usually his fussy time. I just want to establish a routine so Him and I know what to expect and I can get things in order. I like to maintain my clean home and do laundry and cleaning when he sleeps but I feel like I could use a nap or two but I'd rather get stuff done. He's 7 weeks by the way. Please comment below when u had a routine in order and how you did it. I like structure and know it's the eBay for children. I used to work at a preschool.