I just got the privilege to participate in meta, but if I get reputation points here, will that be added to my normal Ask Ubuntu reputation?
What you're asking doesn't actually exist.
The way Rep flows is Main Site -> Meta. You gain rep on the main site and your rep goes up here (eventually) to match. If you lose rep, that reflects here too.
Voting here does nothing to reputation - it's used solely to show agreement/disagreement with the post or support/nonsupport for a given answer or post.
So basically, we reward you for contributing on the main site with the rep system. We don't reward you with rep for contributing on Meta.