Advise about different softwares for using a phone as a card reader for tap and pay.

So I want to do 1 market selling my hobby items (it is still 100% a hobby, accountant confirmed).

Obviously with the way of the world, people don't carry cash anymore. So I am wondering what people recommend to be able to use my phone as a card reader(I have recent Samsung that supports NFC). As this will most likely be a 1 time thing or maybe only a yearly thing, its hard to find the information online about it.

I am not sure what professionals I should speak to about this so I thought I would turn to reddit before spending money asking my accountant.

I know some banks have this as an option, but I live remote and have no access to walking into a bank to ask. I bank with commonwealth and bank west currently but am open to moving banks if worth it.

I have also tried looking into square but to be honest I'm a bit confused look at their website for more information about just using it once.

Any advise and guidance welcome.