Is there anything I can do to give me more chances at a beta test for Heroes of the Storm?

I signed for Hearthstone too, but I was only a bit curious, not much. But this Blizzard´s Dota I really want to play it, being a Dota and Hon player for more than 5 years, and of course a fan of Blizzard and it´s heroes.

Anything I can do or should I just wait, because that pretty much means that I won´t get it since I only own Diablo 3 from the new games, and my PC is not the best out there.