Hacking How do I update my 3ds now?

[Saberthor]

I flashed my firmware 6 months ago and have been playing games safely without worries since then but apparently there's a system update and I don't know what I should do for it. I'm running a cfw luma 3ds, I've just updated it to the latest version but my first question is on the Luma 3ds v6.6 configuration screen, is there anything option I should check before I press start? From there, where do I go to update my system? Thanks for the help I'm on mobile so it's hard to read posts on here at the moment.