How to start mindfulness for stress relief when thoughts race in a busy PM job?

[Aaron_W]

My high-stress job in project management has led to chronic anxiety, and my therapist strongly recommended I try mindfulness meditation for stress relief, but I'm finding it incredibly difficult to quiet my racing thoughts even for five minutes. I've tried a few popular apps with guided sessions, but I often end up more frustrated focusing on my failure to focus than feeling any sense of calm afterward. For those who have successfully integrated mindfulness into a busy, demanding life, how did you move past the initial stage of mental resistance and self-judgment? What specific type of meditation or daily practice length did you find most accessible as a beginner, and how do you handle days when finding even a short window of quiet feels impossible?