Hi Freya
We're nearly a month ahead of you and I've been right where you are!
I think PP advice to think of it that the baby just needs some help sleeping and don't raise your expectations too much is good advice.
My son was fed to sleep then rocked to sleep then had a dummy and I'm now transitioning him to try and self soothe but in a way that doesn't mean I leave him and tugs at the heart strings too much. I've put it below but it's long so sorry.
Regarding white noise-I can't help you there as I don't mind it but I play pink noise all night as I find it more natural sounding. Maybe try a my hummy or equivalent so not on all the time?
So we signed up for the Little Ones Program after being wowed by all those FB adverts (I know). It didn't give me a magic wand but did give me some routine and structure. Essentially the way I did it was just to progressively move the feed back from the nap. So 5 minutes before the nap and then put them down so they're fed, full and drowsy and then 15 mins before the nap...and so on... and eventually we moved to eat play sleep routine.
So putting the baby down to go to sleep. This is the method I used which a friend told me. It's worked for us and we've gone from 6 wakes ups to almost sleeping through. However, there will be tears but having tried some of the more brutal ways and deciding it wasn't for me, I found this was great and my son remained fairly calm with a few whimpers.
Dark room, baby changed and in sleeping bag (white noise ideally). If trying to wean off feeding to sleep then a feed in another room so baby is still awake when you move them to where they'll sleep.
Put a chair right next to the cot so you can see and reach in. Give baby a rock or sing a soothing song and put baby down with a phrase you decide. Put your hand on baby in a way that they find soothing (my son just likes heavy hand on his tummy) and keep the hand in for a minute. Then take the hand away for two minutes and repeat. However, the whole time you're sat there you can sing, hum, shush, talk in soothing voice or repeat a phrase you decide on. I found that the combination of my voice and touch meant my son fussed and whimpered but never really escalated.
Keep doing the above and stay in the room for a few minutes once they're sleeping before leaving to make sure they're asleep. I'm told the first time you do it it can take an hour but my son did manage to go to sleep after 30 and he stop whimpering and fussing after 15 and so was quite calm when he went to sleep.
The suggestion my friend made was to do this first at night when they're more likely to be tired anyway but then continue for all naps. And she kept feeding to sleep at night but found the night feeds did start to reduce.
She said after a week she was able to put her son down and leave the room almost instantly as he settled himself. I moved out of the room more gradually and sometimes I still have to stay for 5-10 minutes but mainly as I want him to go to sleep calmly rather than crying.
My only other thing to suggest is a rockitt pram attachment which rocks the pram and May keep your son asleep?
Hope the above helps or at least gives you something to try?