You don't need any kind of established 'get up' time with a baby this tiny. For the first 6-12 weeks of life basically baby just sleeps most of the time. Any awake time will be mostly taken up by a feed, a nappy check, maybe a little cuddle for 10-15 minutes and then back to sleep. This is 24 hours a day - so day and night time.
I mention this because if you are doing hourly wake ups in the night and are feeding and back to sleep, why are you not just continuing this?
Indeed the newborn stage and early months of a baby's life is the time when you can keep the late mornings with your first child. Why not just continue the 'feed and back to bed' until 9am or even 10am? If you have no reason to get up with older children or work, why get up so early at all?
I am wondering if your baby isn't sleeping enough in the daytime and the disturbed nights are due to over-tiredness? (which in babies can cause a baby to have fretful, disturbed sleep).
Could you try establishing the frequent feeds through the daytime and making sure awake time is limited? No more than 30 minutes really, probably closer to 20 minutes at this tiny newborn age.
Just wake, feed, wind, nappy check, wind and quick cuddle, top-up feed with any left in the bottle - back to sleep. Repeat, repeat, repeat. This can continue day and night at this age. So you can move the same structure to your day/night up to your bedroom (with you in bed) at any stage and likewise keep it going while you are in bed in the morning.
To help with daytime sleep try a bouncy chair and a dummy.