No, you don't want to use tea grounds of coffee grounds because it's too acidic. They can't handle much of it.
I currently am working on my 3rd worm bin. And it's not as hard as it seems.
Go out and get some plastic rubber made totes, drill holes in the top of the lids for ventilation. I use peat moss, play sand, news paper, and cardboard egg cartons for bedding. I like to get it all nice and wet, and let it sit together for a few days so it dries a bit, and it's just damp.. (the worms only dig about 5" down into the dirt, so I say 8-9" of dirt will suffice.) Don't go heavy on the sand either- a handful is enough. It's just to help with traction for the worms.
Then you can add your worms.
For food, you can give them a variety of things... bread, veggies, fruits... I throw koi food in as well as dog food as well sometimes. Stay away from cabbage, carrots, and potatoes. They are too hard and will sit in the bin forever.
Make sure to mix the dirt around about once or twice a week, and make sure it stays moist. Also, do not add grass clippings, as it keeps the heat in, and can over heat your worms. It also will sprout all over the place!
They breed very quickly, so you will have to either add another bin, or make them a bigger bin.
I just started with a handful in March, and I am at about 4-5 handfuls!