Islam is based on 6 core beliefs:

Allah as the creator of the heavens and the Earth.
Prophet Muhammad as the final messenger from a line of previous messengers and propehts
Quran as the Holy Book sent by God for all mankind
Angels as beings of light
Predestination (Qadr) that all things happen by the will of God
Death as the ending of our life on Earth
Day of Judgement (Qiyamah) as the Last Day where God will judge all mankind
Afterlife where we will be sent to live in either Heaven (Jannah) or Hell (Jahannam)

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