You should learn some torquescript even if you don't need to use it. If you can produce quality models, you should be able to learn some basic programming. Learning a few basic things can help you out tremendously if you take the time, otherwise you'll stumble a little trying to get models into the game and tweaking your maps just right. I just wanted to make this point, I can't specifically help right now but I'm sure others could help you more. There might be some tutorials on the rtb wiki (I don't look at it so I don't know) that you could use. To create maps you will want to get the mission editor which is somewhere on the forums, someone will probably post it.
I'm in a hurry so I couldn't completely look over all of this so hopefully I didn't say anything wrong.