Looks well thought out to me, though that is a lot of stuff.

Just plan/budget on possibly sending stuff home after a couple weeks. You can also give/sell unneeded gear.

Youre fine.

Length of "First Tour" is irrelevant. One week is fine. One year is fine.

edit: Dont forget to save room for souveniers! The more I ride, the more extra space I leave for gifts and road-find tools, which get sent home on longer tours.

Look into bar bag for snacks, phone and other quick access items.

edits