Seeking Strength in Believing the Unseen

As-salamu alaykum, dear brothers and sisters. Alhamdulillah, I am a Muslim, but I sometimes struggle to fully grasp the unseen aspects of our faith-like angels, jinn, the evil eye, and magic. It's a challenge to my iman, and I was wondering if anyone has any advice or comforting words from our Islamic teachings to help strengthen my belief in these matters?