Belief in the Creator is built upon the fact that things do not appear without a cause, not to mention the fact that the huge material populated universe and the creatures in it possess an intangible awareness and comply with the immaterial mathematical rules, and to explain the existence of a material and limited universe, we need an independent source that is both immaterial and eternal.
As for the angels, they are great creatures of Allah. They were created from light and have a natural disposition to goodness. They obey the commands of Allah Almighty, exalt Him, and worship Him without ever getting bored or tired.