Feeling Lost - Schedule Advice Needed

Hello, I feel completley lost and confused what to do. Any help or advice would be so appreciate as I’m extremely sleep deprived and struggling.

Baby will be 6 months next week and has always been a poor sleeper.

I’m really struggling to establish a schedule, wake time varies 6:30-7:45am.

At night baby wakes every 60-90 minutes from midnight onwards for resettling and 1 feed around midnight. Can also need multiple resettling in first couple of hours after bedtime.

Sleeps in cot but usually end up Co sleeping out of desperation.

Bedtime between 6-7pm but depends on last wake window/tired cues. I find baby is always very tired by final wake window and struggle to reach 2.25 hours.

Wake windows 2.25/2.5/2.5/2.25 but vary if baby is tired and needs to nap sooner.

Falls asleep independently for naps and bedtime. Naps 1/1/.75 on a good day but can be shorter.