I think theology is pretty simple and we the human weakness (of lust, power, salvation, .. ) has make it complex,

God is one , is all powerful and knowing, merciful, sustainer ( https://www.islamicity.org/covers/99-names-of-allah/) , it does intervene and hold the world together, does not show up else it will defeat free will

Have send down great Prophets Jesus, Moses, Noah, Muhammad, some with book and guidance, all preached monotheism.

We have weaknesses and it’s a test to go against those weaknesses, by holding on to the One and asking for help.

Satan (and its party) are our enemies, it want to divide human and make them busy and fighting each other.

Life is a test; all acts are recorded, and we are judged based on it.

Truth and Beauty are human endeavors, if one follows them and try to implement them will find God,

We are humans not animals and we have consciousness which guide us, but we need to keep the above endeavor and will help keep a sound heart and God will guide us.

Any groups of humans (family, tribe, society) can only survive if it is based on justice, else corruption will enter it and eventually it will be destroyed.

There are set of dos and don’ts, don’t is pretty much common in all Abrahamic religion (alcohol, interest, fornication, eating kosher) , other than certain obligation which vary between them , rest appeal to human morality like saying truth, being honest , clean , fulfil obligations, don’t break blood relationship, love your neighbor,…

Try to stop bad from happening, try to do with your hand, if not than with tongue and if not at least consider it bad in your heart.

There is more to it, but this is quite simple.