You certainly could do that! Some babies don’t like going right into the cot as it’s a big open space to them, we found the next to me still a bit big at the beginning and our daughter didn’t like going down in it so slept mostly in with us for a while. I would say in the long run it probably won’t be sustainable though. I know a lot of women like to have babies close by even until after a year but we found that my daughter ended up actually sleeping better being in her own room which she went into just before 7 months. We were all waking eachother up in the night so wasn’t working out well for us x
The benefit of a next to me is it being a side attachment to the bed. This makes settling them at night much easier (imo), and really helped as a breastfeeding mum. I bought a cot bed and a next to me, the cot bed I eventually took one side off and strapped to my bed frame as an extension of my bed as my son never took to being transferred. I basically did this until he was bog enough for his own normal bed that I could lie on with him (18 months). Long story short, it all depends on how you hope to sleep, how you feed (imo makes a big difference), and also what the child themselves are like (which you won't know until they're here really). My first was never happy in his cot bed. It was a waste of money for me. The next to me, however, was great but you stop using it when they can pull themselves up/get too big so barely lasts.
We found with my first that the next to me was too big in terms of she wouldn't settle at all, as soon as we changed to moses basket that she fit nicely she slept great. So my only concern would be that
I did this with my first. We co-slept for a couple weeks and then he just went in his normal cot next to the bed. For our second we have bought a next to me cot that can eventually change into a normal cot and then a toddler bed.
Not sure if this will help but I’ve recently picked up a Sleepyhead which might help with them feeling unsettled in a larger crib/cot. Not sure though as I’ve never done this before!
With my first my partner used the second bedroom as an office for the first 6 months, we had next to me in our bedroom next to the bed. Then switched rooms round at 6 months when he was old enough to go in own room and then we set the normal cot up. I think both have different purposes, as others have said cot might be abit big for baby but also for you. If you do decide to go straight to cot, putting the Moses basket within the cot to begin with might help baby or delay putting the cot up. I ended up with emergency section and was hard enough getting out of bed around the next to me, nevermind a cot.
If the cot has a new born setting eg the mattress can be at different levels then it should be okay but new born babies don’t always like vast amount of space around them as they’re used to being in the womb, my son wouldn’t even sleep in the next to me for the first 3 weeks! You may also find having a cot right by your bed is quite difficult to manoeuvre around which can become frustrating- I even found the next 2 me got in the way. Have you considered a cot that goes from next 2 me to cot setting? The cozee xl tutti bambino for example is great - you start with next to me and then can build it into a cot later on