montage said:
Most time is spent on the bike, so it makes sense to spend the most hours training there. Doing each discipline twice a week should do the job
Not sure if I agree with that. I would suggest spending most time on whatever discipline is the weakest.
I've looked at a lot of training plans and yes they are complicated. I suspect you will be like me in that you are doing this for fun and the sense of achievement. Therefore I wouldn't get stressed about plans. I'd suggest you run, cycle or swim depending on what you feel at the time and the weather conditions.
Work on getting your body used to going from cycling to running is most important though. I do a lot of work on this in the gym. Start on the bike and go as hard as you can until your legs are burning. Get off the bike and go straight unto the treadmill for a couple of minutes. Keep repeating until it feels natural when you start running.
Also worth spending some time before your event practicing transition and making sure you have a system worked out for all your kit.
I'm fairly new to triathlon but I would highly recommend them. Great fun.