Thanks for suggestions and links guys, helpful.

Yeah, I think I'm worries most about tickets as the system is a bit different, loosing the luggage, finding where to reclaim it after I land and stuff, haha. I will only have a 50L backpack, which probably can't go as a carry-on, so I will have to check it and pay for it.

I will check in only and pay online for those two domestic flights for my baggage, I think it says $25, so it's okay; don't want to go through the hassle when I'm at the airport. So I will have to print off a separate ticket for the ckecked baggage then?