I'd advise you to get enough champs to start playing in normal draft. People seem to take it a bit more seriously than blind, although less so than ranked. You'll also be able to start learning to pick/counter pick. Just realize that in normal draft, priority for champion picks goes to premade groups. If you solo queue, you'll likely find yourself filling whatever role they don't want.
I'd also advise looking for a clan or group you can trust not to troll or afk. Many of them use voice chat servers, so you'll want a good mic and headphones/speakers. They'll tell you which program they like, but I've seen Ventrilo, Skype, and TeamSpeak. Download any/all of them, you should be set for most groups.