1) Having a pure niyyah is the key to everything we do, especially our worship. This exists in our hearts and is cultivated by only giving value to Allah and His pleasure with us. Thus, the first step is to increase asking forgiveness of Allah, this is the position of humility. Then reduce the desire for worldly things and the unnecessary company of people, this creates emptiness that is filled with Allah’s remembrance. Insha-Allah this will help along with reading and understanding the Quran.
2) You can dedicate the blessing of that mustahab act to anyone.