There are ways you can make opening really low pressure if you're having trouble. Go into a packed place, situate yourself v closely next to some girls, chat with mates for 5mins to settle-in, then ask them a really simple opinion opener, then leave. Don't even worry about following up, just leave.

This is about the lowest pressure it can be:- you're in a social environment, you're standing next to them and you need a quick opinion, once you have it you're leaving.

Then, once you are happy doing this, try and extend the interaction.

I had / have mega AA, so know what I'm talking about.

But in the early stages if you've not done much cold approaching before it may be VERY uncomfortable pushing yourself way out of your comfort zone. The others are right though, ultimately you have to act and 'just do it'.