The questions you're asking delve into deep philosophical and theological topics that have been discussed and debated by thinkers throughout history. The nature of existence, the concept of God, and the origins of the universe are complex subjects that often lie beyond the realm of empirical scientific inquiry. Different philosophical and religious perspectives offer various explanations and interpretations.
Regarding the idea of God not having a creator, this is a concept often associated with theological notions of God being eternal or existing outside the framework of time. In many religious traditions, God is seen as a necessary being, not contingent on any other entity for existence. This perspective posits that God exists as a fundamental, uncaused reality.
The question of why there is something rather than nothing is a profound philosophical query. It touches on the nature of existence and the fundamental principles that govern reality. While science can explore the mechanisms and processes through which the universe has evolved, it may not provide a definitive answer to the question of why there is something rather than nothing.
Ultimately, these questions can be deeply personal and subjective, and different individuals may hold different beliefs and perspectives. Philosophical and theological discourse continues to explore these mysteries, but definitive answers may remain elusive.