With a version that high (11.10) you should be able to update right away. Hold (Select) on power on. On the top of the upper screen it should say:
Luma3DS v??? configuration
If the version number is at least v9.1 (should already be the case) you are good to do the update. You find the link to the latest Luma3DS version two posts above if you want to update Luma3DS as well (makes sense normally).
Good luck and have fun!