Train your weaknesses; go for consistent training; stay injury free; practice your feeding regime; train with the nutrition products you will use on the day; be confident that you can complete each discipline; make sure you get to the run feeling fresh; look good; smile when you cross the finish...
I did my IM race in Frankfurt, very nice course, closed roads on the bike and 4 lap run course. The crowds were immense and hugely supportive. I've also completed the Outlaw as the cyclist in a relay team, nice location and well organized but no closed roads. Run around the boating lake so...
Been there, done that and got the tattoo! Not too difficult if your aim is simply to finish. I managed sub 13 hours on an average of 9 hours training per week; if I can do it then I'm sure you can. Good luck and enjoy it.