The adapters you seek are shown right at the bottom of the page. I suggest a quick trip to a
decent hardware or auto parts store and just browsing around for ideas. At your level, I guarantee it will be worth it.
I don't see a breaker bar on your shopping list. I don't like the style suggested on that page. I've easily bent one. Look for something like
this one. Notice the difference in the head.
Also, you're referring correctly to the size and pitch of the fastener. Keep in that habit. However, that M12x1.5 hex head acorn nut uses a 19 mm socket. Get a deep well (long) style. It'll help you keep from scratching your wheels and fenders.