1. Make a plan: Before you start fitness, you need to make a plan that suits you. This can include the goal you want to achieve, the frequency, time and intensity of exercise, etc. Making a plan can help you better control your progress and avoid excessive exercise or injury.

2. Ask for guidance: If you have no experience, you'd better find a coach or an experienced friend to help you get started. They can help you make a plan, teach you the correct posture and skills, and ensure that your exercise style is correct and safe.

3. gradually increase the intensity: don't try to finish all the exercises on the first day, which may lead to injury. Instead, gradually increase the intensity to adapt your body to new challenges. You can start by exercising for about 30 minutes 2-3 times a week, and then gradually increase the time and intensity.

4. Keep exercising: Exercise takes time to see the effect, so keep exercising. If you feel bored or lack motivation, you can try different exercise methods, such as running, swimming and yoga.

5. Pay attention to diet: Exercise is only part of a healthy life, and diet is also very important. Make sure that your diet is healthy and balanced, including enough protein, carbohydrates and fat to meet your body's needs.

Finally, don't forget to rest and relax. The body needs time to recover, so besides exercise, you should set aside enough time for yourself to rest and relax.