"can you tell me if as a person who works in a supermarket convenience store I should be wearing a mask?
The advice is very conflicting still"
I always wear one when outside, even if only to avoid infecting others if I am unkowingly infectious
No advice conflict in Germany or many other countries on the continent:
e.g. in Germany wearing a mask / face covering is mandatory in all shop, taxis, public transport, anywhere people mix indoors with other households
Everyone working in shops wears a mask, also in outdoor markets