well if you are trying to quit smoking then stay away from tobacco flavors find something you enjoy tasting then vape that and for get menthols if that dont work try Google togi sauce its a good menthol
Drink plenty of water if you are vaping.
Also just stopping smoking even without vaping can give a sore throat amongst other withdrawal symptoms.
I had that and the odd mouth ulcer but it passes after a while.
And as others have said try a lower nic and higher vg good luck and don't give up its worth it in the end.
I've been vaping for 11 month now used to smoke rollups but had enough and switched to vaping straight away.