Mr. Eye,
You are new, and thus would be well served with simplicity. Obtain a furled leader, from the Internet, a local shop, or a friend. I would suggest a proper one, but if you're truly unable, I will make and send you one.
You will then put the rest of your stuff away, and simply step down with some tippet to the size you need. Fish it through the season, and don't worry about anything else other than putting the fly on target.
Next year, you'll cut it off, throw it away and lose yourself in leaders, but this year, KISS.
oh, and for tippet brand: i prefer the scientific anglers stuff, but happily buy and use the cortland fairplay from sprawlmart. its half price, 1/4 price if the checkout clerk doesn't pull spools apart, and good enough for me.