Don't be intimidated by the size of the half marathon! If you want to give it a try go for it. Should you find it a bit more than you figured with the running, you will probably be able to finish up with walking! Most run events are freindly to walkers nowadays. Sure you will take longer, but you should be able to finish in a reason amount of time. The same is true with full marathons in many cases, so any of you wanabees thinking about it, just go for it. If you end up needing to walk a bit to finish, there is no shame with that! Many people do this, and have a great time with this! GO for it!