Do not scare them, If you make sure you get a flat at least once a mont the next year you can soon do this with one hand stll in your pocket!

I find them simple and esy to deal with, especially Shimano. Practice, practice..

The result more than pays for what you went trough, simplicity and durabillity.

Now the next thing you do is to buy an axel for the old hub (I think I remember it was suggested that your old hub had a bent axel) andreplace it. You`ll feel great after doing that (and have a spare wheel).