Plug in Nano and set it to 7 on dial and wait 20 minutes.
Will heat up faster on 10 but no rush.
You could always raise or lower temp ,you don't want to combust.
Drop to 6 and vape away making adjustments.
I like 7 ish on my dial though mine is 2 yrs old and leave it on 4-1/2 all the time now...