The tip of my Apple Pencil broke off

Having broken the tip of the Pencil, you must first ensure that the metal transducer, protected by the user-replaceable plastic tip, is intact and undamaged. The transducer is relatively fragile - and if damaged, (a) you may be unable to refit a replacement pencil tip, and (b) the Pencil may be irreparably broken.

The Pencil tip is a consumable part, designed to be replaced as soon as any wear is visible. Replacement tips are available in packs of four:

• Apple Pencil Tips - 4 pack

https://store.apple.com/uk/xc/product/MLUN2ZM/A

You could just buy a Logitech Crayon, with all of the apple pencil features, for half the price.

The problem with the Logitech Crayon is that it uses the less common mini USB coonnection port that needs the use of either a mini USB to USB or mini USB to USB-C cable to charge the Crayon.