Just reverse everything if your goofy....well except leaning forward the same principle's apply whether regular or goofy

Mountain boarding Your hardcore ! snow will be a piece of cake for you

You shouldnt have any issues with speed(FEAR) which tends to be the biggest issue for beginers , id have thought that your used to having the board pointing downhill most of the time so you may find that you progress very quickly.

Im unsure where your arms would be when mountain boarding, as long as they are eitherside of your snowboard when boarding, you should find the transition easy enough.

By tows I was refering to an upside down T-bar that drags you up the mountain rather than chairlifts.

hth