Unless you have a particular airline in mind, whom also happen to work with a flightschool to spit out cadets/cannon-fodder for the right seat, then I would honestly go modular and progress thru at your own pace and not be beholden to a school which may or may not go bankrupt taking all your money with them. So I would take the advice above and start with the initial medical, then PPL and pass those two first prior to spending money.
Flightschools will try to sell you whatever to get you thru the door, but at end of day, your license is based on the CAA you do it with and all of us have the same piece of paper in our pockets. If anything, as a 30 year veteran of this industry, I see an arrogance issue amongst the younger pilots who have been spit out of the “name brand” places after being brainwashed to poo poo on lowly modular graduates.