Hello

Welcome to the forums and congratulations on your new little addition.
First off, maaaaany hugs! I know first hand how difficult and confusing those early weeks can be. Your doing great though, mom! Hang in there! I am more than happy to offer a few suggestions to see if it can ease your situations some
For starters, just kind reminder that he is only but a few weeks old. I know things seem a bit wild and inconsistent but I assure you, super superrrr normal

A lot of it truly is developmental as they grow and adjust their sleeping. The way I always saw it was, 0-3 months they work on their night sleep and 3-6 months, their day sleep. The first few months will be up and down, love. Consistency and better naps will come closer to 4.5-5 month mark for some, others maybe 6mths +. I know it seems as though before he had it down, right? Well as they work on their sleep- it simply changes to more like our sleep. I assure it's developmental- their cycles are changing and they aren't staying asleep as before and wake a bit easier etc. In due time this will change

...I would also like to mention that none of these became props and he is now a great sleeper

just by keeping the simple, small things in mind. Keeping the greater picture at view, and knew what my goals would be later.
Now, if possible (I know all days are different) can you please write your EASY in that same EASY format? I know I say a lot is developmental and you have to go along for the ride but following a simple routine and a few things to have on deck, can help and set the stage for future sleep

...maybe a little tweaking can help the naps some. See how your days are overall.
A little bit of my experience having just gone through this a few months ago, at this age I literally just went with it. I napped on the go all the time, I wore him if it helped, I put him in swings.. etc. he was swaddled and we used the paci on occasion. It was just easier to keep out of the house and stress about naps and sometimes they just helped get him that extra sleep he needed

...at this age my thing was getting him as MUCH sleep as possible. Stroller worked well with my LO. I would try and have at least the first nap at home, maybe the second one. If he short napped it or fussed, I left for a walk or a cruise in the car

...I also did a lot a lot A LOT of resettling naps. When your LO short naps, try your best to send him back off to sleep.. shh/pat him back to sleep or maybe a swing if all else fails. ANYTHING to get him rested, you follow?

...another piece of advice: over tiredness is INEVITABLE-- their such little awake time and sometimes getting them to sleep prolongs the process. It gets better with time

...
Now I saw you said your A time was no longer than 1.5 hrs. Now, is this all day? Is he asleep by 1.5 or do you attempt a little before? Again try and post your EASY

...but here is a link for "average" A times for this age. I think 1.5 is a bit much still- I would try for less but we can try and see after you show me the EASY. Here is the link- it's a great reference to keep on hand:
Average A times- BOOKMARK ME! I will go ahead and add this one here for you too:
Typical Amounts of Day and Night SleepI do remember at this age it is about 4 naps a day and our bedtime was most def not at 5-6pm! I also want to mention as they sort their night sleep, they are also sorting out their clocks. Another words, learning the difference between night and day. If he is waking 30 mins after your "bedtime" maybe he just feel it's his last CN of the day. Perhaps he needs a little later BT for now. As they get older it comes fwd some. This is just my experience. I would begin trying a bedtime/nap time routine now (if u haven't already) and of course during the day bright lights and interactions and at nights keep it dark and very minimal interaction if any at all.
Hope all this helps!!
Hugs xo