hello there
How old is your DS? My DD is nearing 7 months and she sleeps amazingly...I will tell you what we did and see if maybe you can get some use out of it.
When she was little we had a moses basket and she didn't sleep to good in that so we got a cot and put it in our room. I started putting her in there at her bedtime (with a feed sitting next to her bed with lights low). We wouldn't talk to her or even look at her as she would get excited and start to talk. Then we would make sure to put her down awake(ish). I put toys hanging from her cot and for a few nights she fussed (I am not one for the leaving them to scream tech...but to each their own!) So when she fussed, my DH and I took turns...and all we did was go in, say shhh all soft, tuck her back in and leave.
It took about 7-10 days and it was not easy, but then I was able to lay her down awake and I would hear her playing and then she would just fall asleep. I then started naps in her bed once she got used to night and day and same thing...I lay her in her bed wide awake and she goes right to sleep...
We then moved her into her own room without a single set back. She is great with settling herself. Oh also...She is up about 7-8 so I won't let her nap until atleast 10-11...and bed is at 7 so I won't let her sleep after 4:30/5:00ish...that way she is tired but not over tired.
She is still waking at about 12 and 6 for a feed...but we will get there!
I hope maybe some of this helps! However she has had a hard time going down the last few nights cause of the heat so I put her just in a vest and the first night it was boiling!!! And she was all upset so I put her in my bed and she was right asleep and when I went to bed I put her in her room no prob.