Hi,
first off have all the essential paperwork up to date, policies and procedures, fire and safety, child protection, attendance records(must). necessary safety features in the house and garden. this will get you a satisfactory at least.
second write down all the good things you do, in the setting, activities and visits, so you can talk about them and ask parents to write down how good you are if you havnt all ready done so.
basic obs and planning, expect you have done all of this allready?
I have never ever had a prospective parent ask me about EYFS, thats because most dont give a flying fuck, they just want their kid to be safe and happy with you.
finally dont panic, you dont work for Ofsted, they dont pay your wages, if the parents are happy and the kids are happy thats fantastic for business, not a good or excellent Ofsted report..
remember that the inspector is supposed to ask themselves, 'whats it like for a child here?' and i am sure its great.
oh and i have never bothered with the sef online, complete waste of time and effot..
I have a sef folder and I just write down policies I have changed like safety issues leaving the house and what I have improved in the setting like new toys or cleaned carpets.
best of luck