Can I use an Apple Pencil with my 11th generation iPad?

The tags appended to you post suggest that you have a first generation iPad Air. If so, your iPad does not support Apple Pencil - as it lacks the screen hardware with which the Pencil interacts with the iPad screen.

Here is Apple’s definitive compatibility list for Apple Pencil and iPad:

Apple Pencil compatibility - Apple Support

The Apple Pencil is not compatible with the iPad Air.