Good advise so far:

Make sure you have a retrieval boat. No joke.

Make sure you are pretty good at touch and go's on land. If you can go out and do 10+ touch and go's without any problems whatsoever, then you are very ready.

Make sure you have a decent, reliable engine on your plane. You don't want to use that boat more than necessary. Note that I didn't say overpowered engine - one would think that you need lots more power to carry the floats and the resultant drag, but it isn't so. Our planes have a great power to weight ratio anyway, so if your plane flys fine on wheels it will be OK on the water too. No need for any extra weight of too big an engine...

Those are just some of the very basics.

Float flying is very fun! Check out the "What kind of guy wants to fly a floatplane" thread right here and you'll see how fun it is!

Good luck and keep us posted.

Jeff