On https://www.openstreetmap.org/ https://www.openstreetmap.org/, click "Export" (upper-left). It lets you choose a small rectangle (click "Manually select a di

On https://www.openstreetmap.org/ https://www.openstreetmap.org/, click "Export" (upper-left). It lets you choose a small rectangle (click "Manually select a different area"). It gives you a .osm right from the browser. For literally single point, on the map icons on the right, one is arrow with question mark ("Query features"). With this you can click on single features and get their data.