First, I'd like to say,"Welcome to the game." coming to the forums is a very good idea,
If you are looking for a guild, I would suggest the guild hall sections for the worlds you play in. There are guilds that post actively looking for members, and some that wait to see posts from players like your self, and then respond to them.
As for friends, the quickest way is chat. Although, posting here is likely to get you some friend requests as well.