Rach, yes, night weaning while keeping day feeds is very common and it does not have to end breastfeeding. Supply adjusts to the new pattern, so the day feeds carry on.
The others have the shape of it. Go gradually, one night feed at a time, giving each change a few days to settle before the next. Choose which to drop first based on which wake is the easiest to settle without a feed. Having another adult go in, as Hollie did, helps a lot, because a baby who can smell milk tends to want it. Some parents shorten night feeds gradually first, a little less time each night, before replacing them with a cuddle. Expect some fuller mornings and keep an eye out for any tender lumpy patches while your body catches up.
A couple of things to check first. Make sure she is having plenty in the day, so offer the breast and food well, because some babies feed more at night when they are busy or apart from you in the day, and that may increase once nursery starts. And if she seems unwell, is teething hard or is going through a big change, it is fine to pause and pick it up again later. Night feeds and breastfeeding covers why older babies still wake, and how to stop breastfeeding has the gradual approach in more detail. If you have any worries about her weight or sleep, your health visitor can look at the whole picture.
With my second I dropped the middle of the night feed first and it took about a week of grumbling. It is worth it.