Be careful--they are VERY addicting!!!
I have one more race in my third full season this August. Next year, I want to move up to the Olympic distance. And don't worry about pissing matches--tris are so not that. At my last tri, 2 weeks ago, there was a guy in the transition zone next to me who confessed that this was his first tri--he had done Century bike rides and was fine running but he had never swam/swum in a wetsuit etc. So several of us gave him lots of tips and a pep talk. He hated the swim but had fun with the rest of it! I actually get sick of people passing me on the run saying "Good job". Seriously?? You just passed me!! How am I doing a good job
You just need to work out 4-5 times a week. Right now, I bike on Thursday, run & lift on Friday, swim Saturday, run Sunday, then do a brick (swim/bike) on Monday. Ideally, I run one hour/6 miles, bike 20-25 miles, swim for an hour--2000+ yards. Now, I worked up to that!! In the winter, I do one hour spin classes, run is the same, and swim the same. But I lift weights 2x a week. Basically, if you can run or bike for an hour, you can do a sprint triathlon!! Stick with the pool ones to start and then you will want to graduate to open water.
There are lots of good resources--www.trinewbies.com. If you want any info, please feel free to PM me. There are some other moms on this board who have done half-Iron Mans--so wayyy more expertise than me!! DH and I just did a brick yesterday where I swam in a reservoir and he kayaked next to me. Then we got out of the water and did the bike course for my next tri. It was in a gorgeous area. We had so much fun.
Yay for you!!!!!