Because of the frequent successions of swimming and running parts you might start to lose the general overview of the race. How long is the next running section ? When is the next swimming section ? To avoid this, most people note the respective distances on their paddles or arms. Include the supply posts. This allows you to position yourself on the race track.
You will run 33km (Long distance). A wetsuit with long legs causes extra resistance. You should seriously consider cutting the legs of your suit just above the knee.