Hey lovey,
First of all, yes yes and yes again, you are ready for the 3-2!
I think we need to rethink your routine a bit. Are you open to that? Let me just tell you what I'm thinking, you can have a read and a think about it.
I would aim for a 12 hour day, no longer. If she's up at 8.30am, she needs to go to bed at 8.30pm at the latest. Choose whatever time suits you, but for the first while I would deliberately try to have the same WU time every day. Say for a week or two. It makes it easier for you to work out when nap time falls and so on
As creations so rightly says, average A at this age is around 2.5-3 hrs. This is an average, so it's a guideline for you. You are likely to find that baby's optimal awake time, after which you get a good nap without her being overtired, is somewhere in this zone. Often babies have a short first A, but yours does look super short, so I'd encourage her to go a little longer. Just try to tack on 10 mins, keep the new time steady for a few days, see if that helps her go longer than an hour. An hour really is an 'undertired' nap, in that she is getting a good bit of sleep but not as much as she 'could', iyswim, hopefully we can get her to 1.5 hrs or so. Looks like she's doing a good 3 hr A in the middle of the day, so she can probably handle it
At the moment, that last nap is just keeping her awake too long, if that makes sense. If she's waking at 4.15, then I would be trying to get her to sleep, for the night, around 7pm. At that age, I would've been doing 4.15 feed, maybe 6pm feed and then bedtime routine.
I am asking some experience reflux mamas about dreamfeeds and reflux, so bear with me, hopefully someone will pop on.
How does all that sound to you?