if after reading all that you still have any desire to try the game, here's some ideas:
1) Unless you're dead set on being a bloodelf or draenei, don't wait until the expansion. As a new player, it will be months before you're 60 anyway, but the new races' starting areas will be overrun by alts powerlevelling to join their guilds at end-game. I'd advise getting the game now, learn the ropes with an "old" race, then reroll BE or draenei if you feel like it a few weeks after the expansion comes out.
2) You don't have to join a guild at all. For now, at level 60 there's little shit you can do without an organized guild, but with the expansion you can basically skip all the boring raid content at level 60, and instead can keep on levelling in the Outland area. At level 70 you're back to raiding, but with a much different philosophy: smaller groups, much faster instances, lots and lots of 5-man (i.e. doable with randoms) content. By then either you'll WANT to join a guild anyway because you've met people you like, or you'll be bored of the game anyway and quit.
3) Understand that any server you join will be a bit dysfuncional at low levels. There are very little new players anymore, any low char you meet has a 95% chance of belonging to someone with a level 60. Everyone will want to rush things a bit, so if you prefer a slower pace you're better off trying to get a group of like minded people off the bat (they do exist)
4) If you hate people already, you'll hate the game. It rewards dedication and time more than skill, so the more successful characters usually belong to the greatest deadbeat losers. You CAN find casual players, usually in their 30s or above, who play for fun and for LOLIMMURSHUN in a fantasy world. Cherish the ones you meet, they're your only shot of enjoying the game at all.
So, your call. If you do end up buying the game, I'm Grimnuz in Doomhammer Alliance side. PM me if you want me to show you the ropes, I can start a new char to level with you a bit and show you around. Beats wasting repair money to raid Naxxramas again for loot that will become obsolete once Blizz revolutionizes the game in the expansion.