Hey don't be sorry! They don't come with a manual and even if they did it would be wrong 50% of the time. The little darlings love to lull you into a false sense of security and once you're there will change the goal posts everytime!!
I'm assuming from your replies that she sleeps in her own room.....
There are many methods people use. I personally think that once they are in their bedroom then that's where they should stay. So even if you have to go to them in the night, unless they're ill of course, IMO they don't leave the room. So once you've started tying to put her down, you have to keep calm and keep going.
I like pick up put down. Once DD has had her bath (or whatever her routine is) take her to her room and give her boob/bottle or cup in her bedroom. Put her to bed and if you like a mobile (I used them for both of my DSs) then put it on. She'll soon associate this with bedtime (which may lead to a bit of rebellion the first few times!!). Give her kisses/cuddles whatever but she should ideally be awake when she goes down. Leave the room. Here's where it comes down to personal taste: When/if she starts to cry. Count to 10/30/60 whatever you like. If it's not a winding down/I'm sleepy cry go in. Don't say anything or make eye contact. It's time for sleep not play or conversation. You can either pat her where she is or pick her up and hold/cudddle her until she's calm. Whichever you are happy with. When she has calmed down put her back in the cot, preferrably still awake, and start again.
Sounds simple but if she has spent 8 months being cuddled to sleep then it will take a little while for her to learn to self settle.
Don't be disheartened if you find that you spend quite awhile doing this the first night. It should get less the next and so on.
The idea is that she knows you are there, and you get to comfort her not leave her crying, but she learns to fall asleep in the cot.
Again this is all my opinion and my experience, others I'm sure will share their's with you too and you might find another method which suits you better.
TBH I am also quite happy to leave my monster to cry now and again mainly cos I can tell when it's a tantrem!!
As for the night feed, I think one thing at a time. See if you can teach her to self settle then it will be far less stressfull for all of you to try and drop the night feed.
How would you feel about putting her back in her own cot after the feed, or feeding her in her room?
BR