Even if there exist an infinity of different universes they are all finite each one...
What make me believe in God or in the Source, is the existence of an information/formation field which throw his shadow in the mind of any intelligent being in any universe : the prime numbers distribution...This is an absolute fact as the circle is an absolute TRANSCENDANT FACT...
Now listen this music of the primes translated by Alain Connes ( one of the great living mathematician) ...
https://www.youtube.com/watch?v=oBArTv71Edk
The most complex object in the universe is not a material object but a symbolic object : the prime numbers series which include the universal knowledge in it and the cosmic memory...
Those who think that randomness can explain the universe are deluded... Randomness is a relatively constrained phenomena in mathematics...It cannot be defined absolutely by itself...
Think about music which is neither order nor disorder but informed meaning for a consciousness about another consciousness...
Agnosticism i undertand that philosophical position for sure ... But atheism belief is for the weak minds sorry...
There is no need for a proof concerning evidence... In the same way to perceive an evidence we must open the eyes or look in the right direction... In the same way for the mind eye the Source is an evidence at least in number theory if you dont look in nature...
As said a Romanian thinker , Cioran, a non beliver, an agnostic who love reading mystics all his life , one of the best french writer by the way , i paraphrase from my memory : Bach is the best proof of God if there is a God and God need more Bach than Bach ever needed God ...
By the way the OP is right about his thinking ... I studied acoustic to tune my room , and in a larger context i thought about sounds ... It is evident that randomness cannot explain sounds qualities of a source and their direct perception...