The swim leg
If you fear the mass start, stay a bit behind and enter the water quietly after the start (or stay behind if the start is given in the water). Front crawl, breaststroke, backstroke, you decide so stay focused on your swim and don't forget to lift your head regularly for sighting.
When the swim is over, go to your area in T1, the first transition area. If you feel comfortable, you can even lift your goggles up on your cap and start to unzip your wetsuit, then release your shoulders while going to your area. The wetsuit can be difficult to put off; use ample movements to take it off. Then, it's time to strap your race number belt, with the number in the back, and to put on your socks, shoes, helmet and sunglasses, and to leave with your bike hand-held. You can only get on your bike after crossing the cycling start line, referees are watching and you may be penalised if you don't follow the regulations.