Regarding: 'everything must have come from somewhere'
Not necessarily so, cosmologists do not yet know how the universe began, two speculative scenarios are Quantum Emergence and No Previous Era. Both defy common logic, but as Einstein remarked: Time and space are modes by which we think, and not conditions in which we live.
But at the end of the day, when it comes to belief in a deity, each to his own, although IMO, any form of proselytising should be totally banned.
