I agree with jmcctheboss23 - your questions is somewhat vague, but maybe this will help a little... Fly line backing hooks to the reel, which is connected to the fly line, which is connected to your leader, which is connected to your tippet. The leader/tippet combination usually consists of a tapered leader which you connect to your fly line, then a piece of smaller diameter/poundage tippet. Your fly is tied onto the tippet.

I tend to fish this setup in many different ways. One way that I like to fish, is use a 7 1/2' or 9' tapered leader - usually 4x or 5x and attach my first fly directly to the tapered leader. After I have that done, I attach a piece of small diameter tippet (5x, 6x, or 7x) to my first fly; about an 18" length. This piece of tippet is usually tied into the bend of the hook of my first fly. I will attach a second fly to that piece of tippet. Your first fly can be either a dry fly or a nymph, and the second is generally always a nymph, however you can always run a double dry fly setup. I hope that helps, and not confuses...

check out you tube on fly-fishing. you'll find lots of vids on the types of casts. what the hell, it's not a technique contest, put a fly in front of a fish and hope it looks like food. don't sweat the small stuff--- GO FISHING!

DVD time for you. A book is fine but "a picture is worth a thousand words. Google your way to Mel Krieger's "Beginnings, An Introduction to Fly Fishing" or Jack Dennis' "Learning to Fly Fish For Trout." Now, Ross Reels or Courtland Line has the whole set-up for you...the reel is pre-spooled with backing, fly line and leader (tippet) all fitting in a hard case. The Ross Reel package comes with Mel's DVD and can be had at Sierra Trading Post, on line, for $169.95. The Courtland deal is about $149.95, also through STP on line. Tight lines to you!

Also if you have a bass pro or cabelas near you they can set up your rig with the right combination of backing,line,leader that will match up with whatever weight rod and reel you are useing, cause if those things don't match up you won't be able to cast worth a crap.
I don't know about cabelas but alot of the bass proshops hold free fly tying and casting classes.
I have been fly fishing for 35yrs but with just one lesson at that bass pro class added 10ft to my long cast!
Nomatter how long we flyfish there are always more and new things to learn about it!
One tip, as you are practicing your cast, put your wallet in your armpit, if it falls out you have too much arm movement.
also take some string tye it around the butt of your rod behind the reel loop it around your wrist,this will train you to not roll your wrist as you cast.
roger

My suggestion is to go for the entire enchilada. learn the sport from A to Z. Become a good caster, and you will enjoy it a lot more. There is so much meat and potatoes to the sport you can add info, and technique for a lifetime, and have fun at it. I've been at it for over 30 yrs. and learn something new all of the time. I have an old friend that I take fly fishing in my boat who has been at it for 3-4 yrs. now, and is terrible! And he shouldn't be, but he is because the only flyfishing he does on his own is to kick around a lake in his float tube, and troll a fly. He wears me out on the river having to spend so much time with him teaching, and untangling. I'm exhausted when I come home after flyfishing with the guy.