The general rule of thumb when it comes to starting your own pool: If you have to ask the question, you shouldn't do it.
That's said correctly.
OP, if you're really not sure about this, then don't start it. I assure you'll end up loosing a significant amount with it.
However, if you really want to start with this, I'd suggest you to first start finding a "good" server or multiple servers with high bandwidth near your area.