I'm not asserting anything, I'm claiming what I believe and backing my beliefs with reason.
"
Claim: state or assert that something is the case, typically without providing evidence or proof"
(Oxford Dictionary). You asserted, "
... the concept of God has been around ever since humans came into existence." You have not backed that claim with anything.
So are we in agreement that its more reasonable to assume the universe began and that its less reasonable to assume the universe is eternal or infinite?
No. As I said, what is commonly called the beginning of the universe (the big bang) is the beginning of our ability to describe the universe. The cosmology that tells us about the big bang tells us we can't (yet) say anything about what, if anything, preceded it;
we don't know.
My reasoning for it being more reasonable to assume it began is because we observe it having an apparent beginning. This reasoning is very subtle but it does make sense.
To you, perhaps. It's an apparent beginning in the sense that it was the start of the universe
as we know it - in the same way that something coming over the horizon or appearing out of heavy fog has an apparent beginning, a point beyond which you can't say what it was doing, if anything.
There are semantic issues that can potentially confuse things; if the big bang was an event in some pre-existing spacetime, do we call that another (previous) universe, or is it the same universe? This becomes problematic when considering the multiverse - as below.
So if we agree its more reasonable to assume the universe had a beginning and this then means the universe is not eternal or infinite.
We don't know, and we have no way to judge whether it had a beginning or not. Your 'subtle reasoning' is not well-founded. Cosmologically, there are many different hypotheses for the universe and its origin; for example, a temporally infinite universe with repeating big bangs; a Hawking-style temporally finite closed universe that has no beginning and 'just is'; various versions of multiverse where our universe is an expanding 'bubble' of space time that started within a greater timeless 'bulk' metaverse; a version where higher-dimensional membranes ('branes') collide and create universes like ours at their contact points; a version where our universe originates from something like a black hole in 'another' universe, and many more. In the vast majority of them, our observable universe is a part of a greater system, that may be temporally infinite, or atemporal; and our perspective of time is an artefact of our limited viewpoint, either in the Hawking closed-universe sense, with no beginning of time; or in the sense that time 'begins' for every universe in the multiverse with the generation of an ultra low-entropy state matching the big bang.
The multiverse or metaverse idea clearly introduces more semantic difficulties - 'universe' becomes an instance, it no longer denotes everything, and time becomes a 'local' phenomenon, relative to universe instances within a timeless or temporally infinite bulk.
We can then safely assume the beginning of the universe was caused by something. It would then be safe to assume that this cause could be an infinite timeless force that is separate from the universe.
That is one option (for a colloquial use of 'force'), that corresponds to a multiverse or metaverse.
Again this is all based on safe assumptions, therefore, it becomes reasonable to believe in an infinite timeless force capable of creating the universe, this force would be God. This is my very subtle, but significant reasoning for my belief that God created the universe. Its also just one reason of many reasons that I believe in God.
You can call the multiverse or metaverse God if you like; I guess it's a pantheist interpretation.
But as I explained above its actually less reasonable to assume the Big Bang was just an event in an eternal universe.
Not really, no.
Can you link to these god concepts so I can determine if they are right or wrong then I'll let you know my findings
Yes, do let me know if you find them to be wrong

Here you go:
Spinozism,
Pantheism. You'll may find a little background on the early-modern rationalist ideas of '
substance' helpful.
Are you saying my reasoning is fantasy?
No; the reasoning is flawed, fantasy is the result.
If I realize a nuance in reasoning that has been missed by many because I've been deeply praying for Jesus to protect my mind from evil and for God my Father to teach me His truth, I think thats pretty good evidence that you should consider this God that I'm saying is very real.
Forgive me if I don't take your prayer-induced 'nuances' as evidence of anything anything objectively real
Many Christians have said in the past that the God we believe in does make sense and He is reasonable and we just really want you to believe in Him because He can literally explain everything from why the universe began to good and evil to why we exist to miracles to why we haven't found aliens yet to why Islamic extremists are so evil to why a man and a women make a perfect pair when married under His authority to why love exists to why hate exists to the purpose of Jesus dying on the Cross and raising from the dead so that all who believe can have eternal life, I could literally go on and on.
Yers... bear in mind that the number of people saying stuff is not any guide to its accuracy or reliability; and that such claims are backed only by some old, much-disputed books and a lot of wishful thinking.