Post ppl flying
Some great advice on here but just to add that there is nothing wrong with buying a share in an aircraft after you have your ppl. Obviously with the proviso that the share in question has been thoroughly researched first. Plus, there are plenty of non-equity groups about that are far cheaper than hiring from a school.
I would be wary / question motives, of any instructor that says 'never' buy a share and continue to hire from the school at circa £130+. There are issues with shares and groups, like most things, but I don't know many people that continue their flying post ppl by hiring from a school. There are far cheaper options out there.
As people has said, after you get your ppl, things will be a lot clearer regarding what sort of flying you will want to do and where. You will meet plenty of people during your training and your flying post ppl be a lot clearer by then and will probably fall into place.
It's good to have a plan, but your first step is to get your ppl. Trying to work everything out initially, before training is extremely difficult, if not impossible as things change.
Good luck with your ppl.