Hello Friend, Good that you are seeking a help. Distraction is quite common problem due to current lifestyle, social media and other factors.
There are many self learning video and materials available in YouTube to listen. Like Louise Hays affirmation techniques videos. You can also do yoga and meditation which can help to bring focus.
Next Steps
Feel free to reach out to me online through Practo if you need further assistance or detailed evaluation to recommend suitable solution that you can follow practically to overcome this problem.