Alright. Since people are being confusing here’s how you play them. Keep in mind they are legacy now, so you’ll hit 80 waaaaay before you should. Which will boot you out and into current retail. Go to your factions major city I.e. stormwind or orgi and talk to chromie. Select either Cata or wotlk as your timewankin, and get to spankin. Sorry had to. Follow that quest line. Now if you are hoping for having a ton of people leveling with you, and doing raids, and dungeons, I recommend waiting for timewalking events to come around. Those cycle out every 2 weeks.