Scouse Phil.... I've been flying commercially and privately in the UK (and abroad) for 40 years, and most of it on helicopters. If you want my 'pennorth, it's go fixed wing first, then rotary.
You may be a natural pilot, but just consider that you may, like most of us, have to work really hard at it (or worse, be struggling to cope). Get the basics under your belt first - and plank wings are cheap in comparison to rotary. If you are successful great, go for rotary. If you are brilliant, you don't need to complete the PPL A and could transfer allegiance sooner.
However, there's more to flying than just waggling a stick around. After you've learnt how to fly a heavier than air machine, you have to learn how to
operate it. That's what sorts out the men from the boys (ahem, or girls/ladies [Whirls]
). As an instructor, I'm afraid my opinion of many rotary PPLs is low.... not their fault, just that they either don't have the aptitude, or they don't have the money to stay on top of it all.
Good luck!
WW