The point about masks and the conflicting advice is because in Asia they seem to wear them all the time but as protection but studies have shown that they are not very effective for preventing infection as the virus particles in the breathed out aerosols can get through the masks (depending on the materials but some are very flimsy). Also that if people use them with poor hygiene then those that aren't infected could become so, as the outside of the mask could get contaminated as also the hands, which might move the mask down to talk to someone etc etc. Their main use is in preventing or limiting the spread of the water droplets, the aerosols contain virus particle in those who go out when infected either deliberately or unknowingly.
So Tc those people coughing near you, their droplets would have been contained if they had been wearing a mask but at least if you are wearing one and they are very near you it might help a bit as it might filter out some of their coughs! I can understand your worries. When I last went shopping last Saturday I saw someone in the paying queue behind me with a red nose a bir runny so I moved away but she moved up! I was really paranoid as I didn't want to be anywhere near here , not even 2 m!!!
We also have volunteers in the village who will do shopping. The pub can get in supplies and in the nereast city there is a mutual aid group also who has volunteers. Hopefully you will find somewhere with people who can help if you don;t want to risk going out?
I think we will all still need to continue with social distancing wherever possible even if we do have to wear masks, and I think most people will want to most of the time for a long while yet even when we are allowed out.
Hurdity x