Still figuring out sleep

I have a 9wk old (late preterm) that has been struggling with sleep. Naps are finally getting more regular and he goes down easier now (and is putting himself to sleep). He also goes back to sleep easier at night but 1) he still wakes every 2hrs all night 2) during the day he is basically awake an hour, asleep an hour, all day.I was really struggling to keep him awake a week ago (at all) so am glad he’s got more predictable awake time but am wondering: how do I encourage him to sleep longer stretches at night and stay awake longer in the day? Just give it time?