When your on your alone time, read the quran, recite it and try to memorize it, and make dua to Allah to grant you what you want and ask for his forgiveness continuously.
Perform good deeds like giving sadaqah and reciting the Quran etc and do it privately only for the sake of Allah.
Before you do a good deed, make sure it’s only for Allahs sake and don’t tell anyone about the good deed you did, not even your close ones.
Try to develop your link with Allah and improve your iman.
Remember, every action you do is judged by its intentions so make sure the good deeds you do is only for Allahs sake. This is how you remember Allah. Once you have him in your life you’ll be very content.
Those who believe (in the Oneness of Allah - Islamic Monotheism), and whose hearts find rest in the remembrance of Allah, Verily, in the remembrance of Allah do hearts find rest.
[Surah ar ra’d chapter 13 verse 28]