I would say the point of mindfulness and meditation is definitely not about not thinking. The first step to me is awareness and recognition of the present moment, starting with the breath, then moving on to your surroundings, and then observing your thoughts and thought patterns, seeing the impermanence of them, and learning to recognize your almost unconscious reactions to everyday events. There's a good chance it may not even reach that stage though, which is totally fine. even just being present with the breath can be a tranaformatove experience.