In the beginning you may not be able to silence your thoughts completely, but you should remember that time and practice are the main thing in doing this.
You can let go of habits in your daily life that shorten your focus. For example, since social media can offer you a lot of content, you can look at a lot of other content until you choose the one you like, which shortens the focus time you spend per content. This is reflected not only in social media but also in your life.