Any tips for someone traveling alone for the first time?

So, I’m going to Canada for two weeks after Christmas.

And I’m getting more nervous than excited.

I’ve never been away from home for more than a week at a time I’m much more comfortable locking myself in my room than being out places, and the furthest I’ve gone by myself was a 5-hour drive.

I’ve got about 9 hours of travel time both going there and back.
I’m pretty awesome at navigating airports, but I’m terrible at being alone anywhere. I hate strangers and go into a mini-panic attack when even talking to the cashiers at the grocery store.

Once I get there, I’ll be fine. I’m staying with the boyfriend and his family.
But.. um.. how do I keep from going into a panic mode while I’m traveling there and back?

Also.. what the heck do I bring with me to Canada for a two week trip? I’m terrible at packing.