sounds like you are doing just fine.
i have settled on 15s for the stance myself. nice and comfy either way.
learning switch when newbie is tough to do coz you just wanna fly down that mountain asap.... but it is a situation that will pay off in the end and so good for you.
just go with what makes you smile and set your board up with whatever feels right for you.
and just carry on having fun with it. enjoying snowboarding really is that simple
Just coz you don't understand it
Doesn't mean it makes no sense!