You don't write how much data you currently need, but I can recommend to start with time4vps and their storage VPS plans;
https://www.time4vps.com/storage-vps/
I currently use their 9.99 EUR/mon plan with 2 TB storage for my Nextcloud installation.
Of course - at some point you will need more space and performance, and dedicated Hetzner (or similar) will be a better value-for-money option to continue with.
I have no experience driving a Tesla on autopilot, but as a flight instructor I totally relate to your comment about monitoring.
Same goes for when I’m in the passenger seat of a car - I still monitor. I still look left/right when turning.
I don’t know if there is any additional education involved when buying a car with autopilot, but maybe that would be a good thing to learn about the risks and limitations using the equipment.
I currently use their 9.99 EUR/mon plan with 2 TB storage for my Nextcloud installation.
Of course - at some point you will need more space and performance, and dedicated Hetzner (or similar) will be a better value-for-money option to continue with.