Hi, here's what I did, you may find some bits sound good & might help you (or not), or you may be doing these already! my DD is 6mo now.
At night I personally don't wake her up to feed, just feed her when she wakes & settle her down again. I had to learn how best to settle her down as in the early days assumed she was up for the day & didn't try too hard. I have a friend who did dream feeds but I am too chicken to wake her & think she would be annoyed! Settling her down again is just recently becoming harder as she only sleeps 11 hrs a night & is now doing these in 1 block of 7pm-6am ish so doesn't want to go back to sleep at 6am, although if she woke earlier she would.
Daytime naps - learn her sleepy signals & help her get to sleep quick-smart. My dd got better at signals as time went by after she stopped the newborn thing where they sleep at the drop of a hat! Look for staring, yawning (obv!), eye / head rubbing & grizzling. I have a routine for helping her get to sleep - sit on sofa, cuddle her on my shoulder, hum nursery rhyme that I found works well with her (Hush Little Baby Don't Say a Word), then make shhh noises for a minute ish, maybe a bit of rocking. When she is totally asleep I can put her down on sofa next to me (but often don't). Sometime she falls asleep without all this but I think building up the association helps.
I now know she needs a sleep approx 2 hrs after waking up, then may go a bit longer & sleeps very roughly the same bracket time in the afternoon. Hopefully your DD will start to fall into a pattern which you can pick up on & run with.
I read (No Cry Sleep Solution) they need approx 14-15 hrs sleep in 24 hrs, 10-11hrs of that being at night. So this would give you a rough idea of what is about right, obviously there are exceptions.
Hope this helps a little, good luck.