Just from my experience, not having tested all these scooters and being quite a bit heavier than you, i´d say: Hiboy S2 (if available in Italy.
350W motor, best hill climbing speed in the test considering low(er) budget models (my scooter with 250W is struggling with more than slight inclines!) and this thing is light, maybe great for putting it into a trunk. (114 cm long by 41 cm wide by 48 cm high,)
However, not entirely sure if your use case can be met with this thing (no experience, so, yeah, my take on this)