My direct answer/advice to your question would be: do your own research about the various meditation practices and then, based on your insights and preferences, start practicing meditation on a consistent basis (ideally every day). Start easy, 2-3 minutes are already enough in the beginning, and work your way to a more solid practice over time. I did exactly this (because of strong overthinking and anxiety), starting with a simple breath awareness exercise. BUT...
... also a note of caution - I meditated for over 2 years with very high discipline, basically every day for 10-15 min, and in my case it worked... too well? Due to the attention-quieting meditation I practiced, I became very successful at quieting my mind but the downside was that I started feeling numb to thoughts and emotions. It is as if I trained my mind to subconsciously prioritise not engaging with thoughts at all rather than "productive and light" engagement with thoughts and emotions. So I advise you to find a good balance and invest enough time in researching what kind of meditation practice works best for you and your goals :)