Pantheism:

It would seem to me that Pantheism is at odds with a universe that had a begining because on Pantheism God would have had to create himself.

Pantheism means all (“pan”) is God (“theism”). It is the worldview held by most Hindus, many Buddhists, and other New Age religions. It is also the worldview of Christian Science, Unity, and Scientology.
According to pantheism, God “is all in all.” God pervades all things, contains all things, subsumes all things, and is found within all things. Nothing exists apart from God, and all things are in some way identified with God. The world is God, and God is the world. But more precisely, in pantheism all is God, and God is all.
Pantheism has a long history in both the East and the West. From the Eastern mysticism of Hindu sages and seers to the rationalism of such Western philosophers as Parmenides, Benedict Spinoza, and G. W. F. Hegel, pantheism has always had advocates.1
1 Geisler, N. L. (1999). In Baker encyclopedia of Christian apologetics (p. 580). Grand Rapids, MI: Baker Books.