[Elecraft] Mixw & mmtty settings

[Gary]

Trying out RTTY for the first time here on my k3.
Reading the setup for both I am getting bamboozled, no big surprise there I know.
Getting the k3 to "talk" to the software is proving a tad difficult. (read, I'm slow?)
Is there a link for step by step setup for a k3, and also, am I correct in my assumption that the software will follow VFO A as it tracks up and down the band.
Using line In/Out and USB to serial for PTT.
Figured I better master this BEFORE I do the IOTA expedition.
Any assistance welcome, but be sympathetic folks, I'm getting older by the day you know.
73
Gary