The PPL will teach you to get up round & down safely & to navigate through controlled airspace etc, with "sufficient" attention to emergency procedures ref engine failures etc.
Gliding will teach you to "fly" acurately / efficiently as possible, your main comunication system is a lookout, you will always be aware of the next landing site in case the lift stops, your ability to "get somewhere" will depend on your skill, not a tank full of fuel.
When you then fly power all this will help considerably.
I was gliding 20 yrs ago & at that time started power, went solo after 3hrs. I then stopped, started again last year, took 14hrs to solo 60+ hrs to NPPL. I am now struggling to land a Chipmunk. If I had kept up the gliding I don't think I would have a problem.
So my advice FWIW, glide first, then power so at least when the fan stops you are well used to it & will not !!!! yourself at the silence, & you will be a better "pilot".