Debian does not contain the wifi drivers of Linux Mint so that could be frustrating if running live.
Here is how to look for the drivers:
https://packages.debian.org/stable/kernel/
Use novice users would not expect wifi drivers to be in the kernel section.
Once in the kernel section use cntl-f and search for your wifi adapter's name.
Open that and search again for specific model
Once you have verified the correct driver'a name you can install it through terminal.
apt-get install firmware-iwlwifi