Theists, provide your arguments for God.

[Sheldon]

A beginning does not imply a creator. Try again.

It does implied a creator.
Let’s take a look if it doesn’t. If there is no creator then the only possibility is:

The first beginning matter/s started to form itself from absolute nothingness.

Absolute nothingness is absence of everything, include absence of will and absence of mind.
So from absolute nothingness can produce something. This is impossible and can't be rational.

False dichotomy fallacy, emboldened.