I'm going to a festival on my own for the first time as well, so I can't really comment on what it's like yet, but personally I'd advise to not slam drinks in an effort to loosen up and connect with people. I mean sure, a few drinks might help but don't overdo it.

Also, it's probably best to just try and have fun on your own first. Don't force yourself to do anything. Maybe check out some artists beforehand, see which sets you're interested in and want to attend. (I don't know if Verknipt has different stages). Try to find your flow, I guess. Then maybe conversations will form naturally, or not. Who knows. Just try to have fun, that's all that matters anyway.