I have the same network card, lenovo ideapad 330-15arr. This work, tested https://askubuntu.com/questions/990378/wi-fi-not-working-on-lenovo-thinkpad-e570-realtek-rtl8821ce. Only problem is: you do not have make and the necessary dependencies out of the bat so first you need to connect to the internet by other means (I used my phone's USB tethering, do sudo apt update ; sudo apt upgrade; sudo install make; and after that you do inside 8821ce folder: make all make install modprobe -a 8821ce
nagy zoli
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