You can install gnome tweaks
sudo apt install gnome-tweaks
Then look for tweaks in the app menu.
You may want to open your startup applications app and check to make sure that there isn't a listing for disable laptop lid switch booting with the os..
You may want to look at the top x+1 things to do after installing zorin in the tutorials section of this forum. Tlp is great for extending battery life and has an option there as well for the lid switch i believe.

