Newbie,
I have just completed my first Sprint Triathlon. I trained for about 3 weeks. I am not in the best of shape nor did I have any idea what I was doing. I did find, online, what they call clinics. Now they are pricey, actually more than the race itself, but was it worth it for me. You will have a coach walk you through the swim bike run and the transitions. For me, the coach swam, biked and ran with us, watching us and giving us pointer on form and such. Also, she set up a mock transition area and we ran drills such as getting on and off the bike and easier ways of transitioning with the clothing. Wow did it make a difference on race day. Some people thought I had actually done it before. Well if you need any more info I would be more than happy to help with the titbits I received at my clinic and my race. But like I was told and I will tell you. JUST HAVE FUN WITH IT! Really you will feel so good after, maybe not the day after, but that afternoon will feel awesome once you cross that finish line! Good Luck!