Keep your training regular, if you stop for two weeks, then a lot of the previous work will be lost, make time for training, but avoid letting it take over your life, triathletes have a high divorce level. One of the reasons a lot of good triathletes come from a different sporting background. Keep your training interesting and varied to keep motivation high. Train with new partners, do different runs i.e. track sessions, hill sprints, fartleg, off road, sand dunes, treadmill - try spin classes anything that will keep your mind and body working. If your swimming is your weakest discipline, then the more time you can spend in the pool, then the greater your confidence will become in achieving your goal.
Swimming requires little equipment, a swimsuit, goggles, swim cap and a pool.
The swimming pool is the most important item, as it is here that you can study how others swim and hopefully ask for advice from either coaches or strong swimmers after they have finished their workouts. To improve your strength for the swim use the weight training program for swimmers once per week, combined with the following sessions ideally twice per week. This session is a total of 1,000 meters, I have not placed any timings during the swims. As you become fitter and more comfortable aim to reduce your rest period between swims, and increase swimming speed. This session is 2,200 meters, take adequate rest between each part of the workout, concentrating throughout on good technique.