RPI3 with USB-Stick

Having problems with restarts using HA OS 64bit
-the usb is getting hot and when i restart i get no IP
in this context, is it better to use a SSD?
What is the best way to shut down the RPI complete?Pull the cord?
The board there is an installation guide using Debian 11, what is the advantage.
My project is targeted to record a years data of my heater controll system.

i further questions -if you like:
Installation of above project with container docker? Which makes sense?
A beginner requests help. Thanks