Help with VGC??

[Azelais]

So I have absolutely no clue if this is where this is supposed to go, and if it's not I greatly apologize, but anyways.

I would like to participate in VGC this year, but I have some questions and honestly haven't been able to find answers. Please, any help would be appreciated.

• Is it too late to participate in VGC 2015?
  
• How do you sign up for regional tournaments? Or do you just show up?
  
• Can you sign up for regional tournaments, or do you have to be invited or win more local tournaments beforehand?
  

Any info at all would be appreciated. Thank you!!