If you're part of a team, then the coach will provide a structured routine for you. But it's always good to have your own routine as well, for personal practice. Having a routine that has elements of aerobic exercise, (which means swimming for longer) as well as a moderate endurance workout (which focuses on mid-distance and moderately hard swimming) can help you get faster. Your workout should have several elements but the main part should focus on endurance, speed, and muscular endurance. Here's an example of a structured workout you can try:  10-15% spent on an easy warm up (4 x 100 easy swimming with 20 seconds of rest between each distance) 10-20% spent on drills and kicking (8 x 50s as an alternating drill, with 1 kick with 15 seconds of rest) 40-70% spent on the main set (6 x 200 with 30 seconds of rest or 12 x 100 with 15 seconds of rest) 5-10% spent on cooling down (easy 100s) Search for swim teams in your area, and find information such as how much it costs to register, what time practice is at, and what equipment you need. If you're not already on a team, being on one can definitely help you swim faster not only because you'll have more motivation to practice every day, but because you'll also get more practice during races and will be working with a coach who can help you master the correct technique.   If you do join a team, you have to commit to coming to practice every day. Push yourself at practice. Try to make the send-offs with 5-7 seconds rest. Once you've mastered that, try 10 seconds, 15, and so on. If you are on a swim team, then you'll be participating in swim meets regularly. Don't be nervous; it's not about getting first place, but about beating your best time. Most swimmers swim faster during swim meets than practice, because adrenaline is high and there's more at stake. You can "trick" your body into swimming faster just by attending swim meets. Swim clinics can teach you better form for your strokes, tips for achieving more, can help you with your dives and turns, and may generally...

TL;DR in Indonesian:
Buat rutinitas yang terstruktur. Bergabung dengan tim renang. Ikuti perlombaan renang. Ikuti klinik renang. Cari informasi lebih lanjut tentang renang. Berlatihlah di pusat kebugaran. Biarkan orang lain mendorong Anda. Siapkan pikiran dan tubuh Anda.