what is the full cycle that happens after we die?

Respected Brother/Sister,
Waheguru ji ka Khalsa, Waheguru ji ki Fateh!

The undersigned will like to bring to your kind notice that as per teachings of Guru Granth Sahib, Akalpurakh sitting inside us, as what we call soul, gives strength to our body and it functions. As soon as He withdraws the strength, physical death takes place. The five elements of which the body is made of merge with the earth and the soul merges with Akalpurakh. What happens after that no body knows.

Further, reincarnation, after death, is not a Sikhi concept but is of Hinduism. In Sikhism, the mind gets into the cycle of reincarnation, when it gets stuck into the material world.

Sikhism subscribes to the theory of spiritual emancipation/salvation in this life itself. The spiritual emancipation/salvation in Sikhism means getting rid of vices by changing life, becoming a righteous/virtuous person, not getting stuck in the material world, becoming one with Akalpurakh and Shabad Guru, who are spiritually embodiment of each other, achieving the stage of spiritual equipoise and spiritual bliss, as per the teachings of Guru Granth Sahib.

Hope it helps. You are welcome to raise further questions and also intimate if you find any deficiencies.

Regards,
Your Brother