So, you should start out by reciting Surah Ikhlas and Durood-E-Ibrahim as frequently as possible right after every single compulsory prayer (Namaz). Then it might help in case you repeated "Wala Houla Wala Quwata, Ila Billa Hil Aliyul Azeem" at least 1000 times daily. Make sure to do Astagfar https://youtu.be/3OgOkpgzAug