We're finally starting as well in Sept. We were planning on starting last Easter, but then school lured DC in with all of the end of school year fun and activities and it seemed easier to just finish naturally at the end of the school year.
I've joined a good half dozen local Facebook groups - we live near a couple of other counties so we can go over the border as such. There are loads of great Facebook groups with organised weekly meet ups and some groups organise group/school price bookings to places such as Legoland, Theatres, organised activities etc at discounted prices. Plus there are other Facebook groups/websites for science resources, lap books and all sorts depending on what interests you have.
Because we have another child staying at school and also a lot of extracurricular stuff after school, we'll prob be less flexible than a family with just one child or who is HE of all their children as we need to be home by 3pm.
In the first week of Sept we're going to at least one if not two local 'not back to school' picnics - hope to make some new friends. Might be worth seeing if there is similar in your area?
Also on our agenda the first week is to make a long list things to learn, do more of, explore etc. Plus DC would like to make a time table, although I suspect that will fall by the wayside quickly, but it will get them thinking maths wise how many hours in a day, how many hours there are minus meal times, extracurricular stuff, chores, cooking, picking up younger DC from school etc and what they want to achieve, what might or might not be practical to fit in, so not a bad exercise in itself re time management?
Also, DC is in Brownies and the badge book is a fab resource of ideas to look into, things to learn about, new skills to try; so that will be a good starting point for some things we want to do as well - with the added bonus of getting badges for learning!
So our child who will stay in school doesn't think it's all fun and no work at home and that they will miss out on fun, we'll do an hour most days of maths/literacy, or at least that's the initial plan...
Our DC is also 9 (10 soon) so at this point we'll do the national curriculum for maths/literacy, so that we can keep future options open - plan is to go to high school at this point, so we will in theory have 2 years at home.