At this stage, appropriate masks are only recommended for use by the general public if in the ‘at risk’ category, that is immuno-compromised, elderly, in aged care, in hospital, etc. As others have posted, the run of the mill masks are of no use, as they do not block the ingress of the virus. They are useful on the other hand for people with COVID-19 symptoms because the masks reduce the distance the virus travels from coughs and sneezes.
I was in a chemist yesterday, and they were selling useless two ply masks for $2 each. Not too many weeks ago, you could buy a pack of them for about $2.
The disposable gloves stop the viral contamination onto your hands. You do not catch the virus from your hands. It is spread from hand to face contact. AND, the problem is that people frequently unconsciously touch their faces.
If you have gloves on, and you pick up a virus on a glove and touch your face, it would now be on your face and on it’s way to infecting you. The way to stop it is to wash hands frequently, and use the trolley disinfectant wipes or paper towel and disinfectant @NayA mentioned. Leave the wipes/towels on the handle. That way, every time you return your hands to the handle you are re-cleaning your hands (assuming the wipe/towel is still moist). More importantly, if you touch your face, it is with clean hands.
At all the Woolies I have visited they have tape on the floor at checkouts etc to indicate safe spacing, so I am wondering why the Woolies at Karrinyup hasn’t done this. Perhaps you could ask the management there?
All up, the safest thing you can do is stay at home.
Hopefully, you will stay well.