Front of my IPhone screen is cracked?

I cracked it by not having a case on and it landed face-first on the concrete. Yes, I know, stupid idea not having my case on. I need to know the following:
- Is it hard to get your own screen and put it on yourself? How does that work?
- What are some good cases?
- And how's the cheapest way I can repair the front screen without having to do it myself? (if there's such a thing)

Firstly
-yes you have to be very delicate and it depends on your age and experience also?
-otter box cases or some flip ones(some cases are very cheap on amazon),
-idk a good cheap place but the best place is apple if you can't, go to any place you know that can help you

A Good case would be an otter box. I recommend the commuter, that's what I use.
I cracked my 3GS screen and apple wanted to charge me $150. If you can't figure anything out then just go through apple. Go online and search for iPhone glass, also see if there's any screen repair shops in your area, and ask them how much they would charge.