There was a guy who bought beer using Bitcoin recently in a small local bar in Boracay, Philippines. He paid 1,600 sats for one bottle using Strike App which supports Lightning. It's definitely possible to use Bitcoin for microtransactions, but it depends on the adoption of such merchants if they are willing to accept bitcoin as a primary source of payment.
This kind of on boarding best works when people approach individual merchants. If you frequently visit some places and they know you, approach them and try to get them to adopt Lightning. It is actually surprisingly easy to set it up.