Hey OP to answer some of your questions:
Equal preference means that schools do not know where you put them on the form. So putting a school first doesn't give you any more sway over getting a place than putting it 6th. BUT it does matter what order you put schools in. To explain with an example:
If I live a mile from school A and put it first, and you live half a mile away and put it third, but you do not qualify for your first or second preferences, you will get a place at school A over me - as you live nearer. (obviously if you qualify for a place at your first or second prefs, then you will be offered that.)
So you should put schools in your actual preference order. even if your first pref is a long shot. Listing it won't harm you chance of getting a place at a closer school (as long as you list it) if it is too long a shot. But if you put your closest school first and the long shot further down the list, then you will probs be offered the closest school - I have known ppl do this and then be disappointed. That's why I say the order matters.
Does that make sense? It is a bit confusing but summed up, the advice is:
List schools in your order of preference
Always include a 'banker" - a school (usually your closest) that you are pretty certain of a place at. If you don't, you risk getting none of your prefs and being offered an unpopular school a long way away
Use all your preferences on the form
The usual admission criteria (the same as oversubscription criteria really - in other words how it is decided who qualifies for a place at school A if more than 30 (60, 90) parents apply) are looked-after children, schools named on an EHCP, siblings, then distance. Sometimes there are criteria relating to religion. Some schools have feeder nurseries but that's not super common.
Nursery associated with a school can be good for meeting DC who will or may go to the school, but it doesn't usually have any relation to likelihood of getting a place at the school.
You have plenty of time - applications for your DC will be in autumn/winter of 2025-6 - but it's a good idea to start looking at schools - go to their Christmas fair, ask to look round, keep an eye out for open days.
Phew! sorry for essay!