You didn't say whether you are a man or a woman and your age, so I assume you are in the range of 25 to 35 years old. Although the range is relatively large, your overall physical fitness is still good at this age, which is the best time of your life.
If you just started exercising, I suggest you go to the gym. If you start running, it's hard to stick to it. If you go to the gym, you can follow the group class. You only need to apply for a fitness card to participate in group classes for free, and there is no extra charge.
The advantage of group class is that a group of people are led by a coach. Relatively speaking, the training environment is relatively good, with teachers' guidance and more content, such as bicycle class, barbell class, dance class, yoga class and so on. A group of people train together with enthusiastic music and company, so they are not so tired during training. It can be said that their body and mind are more enjoyable. It is also easier to persist, and the training intensity can be adjusted according to itself.
After a period of group training, you can join some other more professional training, or you can follow the group class every day. The effect in all aspects is really good. I hope you can stick to it. Training will make your body worthy of improvement and make you have a happier life. I wish you better and better. If you don't understand, you can trust me privately. I'm just a fitness enthusiast.