Berliner scarred of Pisa car rentals 😅🚗

Salve dear Reddit Pisa Locals! 🌼

I'll be staying in the countryside near Pisa next week and was hoping to get around by car.
The problem is that many rental companies seem to have pretty bad reviews and stories about hidden fees or shady behaviour.. I am honestly too scarred to rent and possibly get scammed 😞 And also just have a Debitcard instead of a credit card, which almost all the companies seem to require.

So I just wanted to ask if you know any local App/Website, where private people rent out their cars, which we do a lot in Berlin. Or any trustworthy alternatives to classic car rentals.
Also, on the off chance that someone here has a spare car they’re not using next week and would be comfortable arranging something privately, feel free to message me : )

Any tips, experiences or recommendations are very welcome!
Best regards from Berlin,
Lizyyy