What are the ways to get into the championship?

[Thundrio]

being that next year it will be my last/second year on the team before graduating, i am going to try as hard as i can to get us into championships if at all possible (we were rookies this year), so i was wondering what are the different ways a team can get invited to championships? i know the obvious way is to win regionals, and i heard winning the rookie allstar award gets you in as well (which we obviously cant win next year), but what are any other ways?

also is it known the location of championships next year? and if not when will it be known?

thanks a lot in advance for all help.