OK. I would stop trying to mimic what you used to do and start afresh, with a new way of settling.
Firstly set your expectations - this is not a magic wand. It won't be easy. It won't give you results straight away and it won't necessarily stop night wakes etc.
I would feed baby downstairs, before amy part of bedtime routine starts. Then upstairs 7-8pm, depending on naps (aim for 4h awake time) and do your normal bath/teeth/song routine then into the cot. Fully awake.
Lie yourself next to the cot (I assume it's next to your bed) on your bed and lean an arm into the cot. Or if the cot is in another room bend down into the cot as stood next to the cot).
Hand placed firmly on chest/back/side. Not pushing down but quite firmly, so baby can feel you there even with her eyes closed.
It sort-of gently pins baby down, as well as being your reassuring presence. A second hand helps if legs are kicking around. You are trying to teach baby that in order to to to sleep, she needs to lie down on her cot and be still. So make these (not going to sleep) your goal.
If she squirms around, keep her still with your hands. If she fights against your hands then remove your hands and lie her back down, starting again. Any time she goes for getting up, moving, squirming around - you encourage stillness.
So while doing this, you also want to encourage quiet alongside the stillness - then you get calm. Calm is the initial state that is needed before baby can relax and then sleep.
So to encourage quiet I would use a dumny to comfort suck. Or maybe a muslin square to vgew on or a cuddly toy. Introducing a comforter toy is a good idea. They don't normally get noticed until 12 months old or so, but having it in place ready for then is a good idea.
With your firm hands do gentle pats or strokes to try and calm baby down. Not constantly, that gets too simulating, but if she needs calming. The off shushhhhh helps too. But again, not all the time. The main aim is still, quiet, calm.
As soon as you get to still, quiet, calm, don't move a muscle. Stay there, hands on baby and wait. Completely still, don't try to extract yourself otherwise it just teaches mistrust ("as soon as I relax, mummy goes. So I must fight to not relax so that mummy stays").
As I said, this isn't going to work 'just like that'. But you have to have faith and trust that you can do it. That baby can do it.