Ask yourself this question before you jump on coding because it is so important to set goals first and work on them step by step. It gives you a clear vision on what you are doing but also you will feel motivated and more disciplined so you can achieve your main goal. For me, I had the idea to create my own music website and application as well as adding new options and aesthetic themes for a better experience.
Programming has various fields and roles you can choose from such as web development, data science, game development etc.. The reason why you want to start learning coding may easily lead you to answer this question. For me, it was all about web development and mobile app development obviously.
Please make sure to choose the right programming languages