teamliquid is like the ftr of starcraft2. If you're looking for a resource, you won't do better than that.

As far as zerg, if you're new to SC2, I wouldn't recommend zerg. Why? Because they're *easily* the hardest race to master. This is because of their larvae mechanic. It's basically a third resource you have to manage, and it's really difficult in the early game. Do you use these larvae to produce drones? If so, your standing army will be much smaller. Do you use those larvae to produce troops? If so, and you don't use them to attack or anything (successfully), you've basically hurt your economy going into the future since those larvae could have been drones, helping you gather more resources.

Also, for the zerg counter to Thors: try ultras. DO NOT TRY MUTAS. Thors hard counter mutas so much it's laughable. Area of effect attack against light air units = muta death. Or, if you want to go the cheap route (and the Thors don't have support units), use shit tons of lings. Cost for cost, the lings are super effective vs Thors because lots of the Thor damage will be wasted.