You really don't need a coach for your first race unless you have some very specialized circumstances like a job that requires you to travel a lot. Otherwise, an out of the can program like those available on beginner triathlete will work just fine.
The most important thing is to remember to have fun, both training and racing. People often put waaaaaaaay to much stock into what these races represent.
Living life like there's no tomorrow.
http://gorgebikefitter.com/
2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR
2014 Soma B-Side SS