I have a 55 druid but I was L40 several expansions ago and stat gear has proliferated since. So what your Wisdom should be is hard to say but close to 200 is probably reasonable. If you need cash to buy gear, you should be able to farm silks or hides well enough.
For grouping in the 40 the Dreadlands are a standard suggestion and there are some easy quests to do there with the drolvargs. Ldon is also a good place for experience and there are a few useful spells to get. I think the ulthorks in EW are also good for this level solo and their tusks can be turned in for valuable gems and items in cobalt scar. This make is a heavily used druid quad-kiting zone.You could also solo or group in Gunthak. Check out eqdruids for other advice on this and quad-kiting. Another tactic less commonly used by druids is charming animals and is more suited to druids with higher charisma. If you like to do this, EW is a good plce to try it. I strongly reccommend snaring the mob you want to charm first. If you cant do it now, try it later when you get better spells for it.
As for a primary slot item you are probably best off getting items to raise your wisdom and/or mana since you shouldn't be meleeing. An exception may be some thing like an earthcrafters staff which has a good ammount of wisdom and mana, plus casts a combat proc thats useful when farming. Im not sure offhand what level it procs, but its probably on the items listing here.