Congrats...it's addictive...or you will totally hate it, there is no inbetween! )
As far as advice...
make sure you are properly trained for the swim. That is one thing you can't fake. You can coast on the bike, walk on the run but if you stop swimming you drown! Also hold back a little on the bike...your run will thank you. Proper race nutrition is vital. Slowtwitch.com is a great place to search and read a lot of info but you have to wade through the people who " think" they know what they are talking about! If you have any questions drop me a pm.