Aye up! We're being taken over! The Yorkies are all over us! Hello YV, driver, Taz, Blossom, my auntie Clare the postmen and anyone else who knows me but won't admit it.
So YV, you need O.2mm Kanthal wire and it can be A, D or any other letter in the alphabet, it doesn't matter. The more you buy the cheaper it gets. If you 10m plus you'll get it on a spool generally but it's your money and you decide.
I would normally advise getting it from Rob at Stealthvape but he's off sick at the minute so someone like Vapemesh will do.
Once you've posted what atty you have or getting, I'll dig out some links and videos to give you a better idea on how to build a wick and a coil as there are one or two variations.