Tips for getting 4yo DS to sleep in his own room for first time

[FlyMetotheMoon0]

We have lived in a one bedroom flat for the past 4 years so DS has always slept in my bed with me,
We finally moved to a 2 bedroom flat about a month ago and I would like to get him to start sleeping in his room.
He's a bit scared of noises, he's going through a monsters phase (but he sleeps in my bed fine with the door closed and lights off) there are people who live above us and he still hasn't got used to the noise they make when walking about.
I'm going to decorate his bedroom with his favourite characters but what other tips can you suggest/worked for you?
Also he starts reception in a few weeks...do you think it would be better to wait untill he's settled in or just crack on with trying to get him on his own room?
TIA and sorry for the long post

Just to add he loves his bedroom and spend quite a lot of time in there during the day but I mentioned about sleeping in there a few days ago and he said 'no mummy I sleep in your bed'

You could try talking to him about how he's a big boy now and big boys sleep in their own bed, in their own bedroom.

Is he starting school in September? Maybe you could use that to illustrate just how much of a big boy he now is.

Tell him you are getting squished in your bed and you made the room just for him. Maybe get a special duvet cover.

Why don't you set up bed in his room for a bit? Then gradually transition out after he's started school?

I think I will give the big boy talk a go, I'm going to decorate his room in his favourite characters just waiting for the curtains to come so that's a step in the right direction
Yes I could set up in his floor for a few nights
Another worry is once I actually get him to fall asleep in there what do I do if he wakes up? He can open stairgates so that's not an option. He usually sleeps right through untill morning in my bed but don't know if he will be the same in a different bed
curses self for not putting him in his own cot/bed from birth

Stay there a few nights. Then you start to leave him to fall asleep alone - just do the old "I'm popping back in one minute" trick, making sure you really do come back in one minute. You start leaving for a minute so he is used to you returning. Then you say you'll be back in 5 minutes, and go back. Then you extend the time and hopefully time it so that it's just as he falls asleep and he gets used to it.

I'm dreading it tbh but I know I need to do it, for his sake too who wants to sleep in with their snoring, teeth grinding mum forever ay

We are just going through exactly the same. We have said (compromise and I miss her!) that she has to go to sleep in her own room but if she wakes up after we are in bed she can come and get in with us. At the moment one of us sits with her until she falls asleep(on a chair ignoring her) and we are gradually moving the chair further away and she is falling asleep quicker every night. This is very gentle and has been fine so far, (we Are total softies). We also couple it with lots of talk about 'grown up girls' sleeping alone etc, lots if praise and also explaining that if one of us has to stay with her then there will be less time for playing in the day as we will have to do the 'jobs' we could have done in the evening while she was asleep. Dd also 4. So far so good though she clearly finds it hard