This is your assumption, and I am going to go along with it - in this thread. Let’s assume that this universe is not all there is. Let’s pretend that your “first something”, “prime whatever”, etc… type of argument was successful. What can be deduced from this assumption?
Use your logic only. The only starting point is that the universe does not stand on its own right, that it was created. No reference to faith, revelation and such. No other auxiliary assumptions. What can you say about this creator?
If you don’t like the restrictions, do not post. I am only interested in your logical conclusions. Show me how logical you are.

I will post my views later. Don’t want to influence your ideas.
I would like to offer a logical and developing understanding, which main purpose serves to draw others closer to the Catholic Faith. It also is shared for Harsh Critiques regarding Alignment with Catholic Teachings, for I want to ensure my understandings are aligned with the Church, for The Church is the Truth.
Reflections on the Triune God/Absolutes of the world*
Reflection on the Human Being
Humans have body, mind, will and interactions, and essence. Each is distinct and co-existing. The body can tell the mind what it feels, whereas the mind can tell the body what it thinks. The will and interactions proceed from the body and mind. Each can be of varying qualities of peace, happiness, energy/power, and wisdom, and the pinnacle of being is all distinctions working together as one.
Humans also have Free Will and Free Desires.
Reflection on the unchanging forces of the world*
There are seemingly various gravitational forces in the world as we know it. There is,among many, Gravity - Why a person forcefully seeks the ground if placed in mid-air. Then there are: Peace, Happiness, Energy, Wisdom, and Love - Why a person forcefully desires peace, happiness, energy/power, wisdom, and/or companionship, when a person is distressed or sick, sad or violent, unmotivated or weak, ignorant, or alone. These are the Unchanging Laws of Physics and Metaphysics.
*The use is not bound to any limit of worldliness. It could refer to mind, planet, solar system, galaxy, universe, multi-universes, parallel universes, etc.
Reflection on a few Necessary Components guaranteed at the start of the world:
Necessary Component - Since the Laws of Physics and Metaphysics do not change, these Laws must have been fully in place prior to the beginning. (The Word, focally Mankind)
Necessary Component - All the matter and energy of the world must have been gathered together in Unity (focally the Creator)
Necessary Component - One or both must be True: These Laws must be fully supportive of a State of Perfect Love**, and/or a Perfectly Loving** Creator set the Word. **The Perfect Patience, Peace, Kindness, Happiness, Motivation, Energy, Knowledge, and Wisdom throughout the Body, Mind, Will and Interactions, and Essence towards others and the self (focally communion of the two by the Holy Spirit)
Necessary Component - All of these Components must work together in Unity, to cause the universe to begin, to start the motion of expansion, and to possess all of the resources that can be found in the Universe. (Essence)
It is these Absolutes that we call the Word, The Godhead, the Will, and the Triune God(All Components working as One to be Everything)
Reflection on the components of the Creator:
Humans are created in the image and likeness of the Creator.
The Creator has a Body like Humans (Jesus), has a Mind like Humans (The Father), has a Free Will and Interactions like Humans (The Holy Spirit), and has all three as distinct and co-existing, and working together in complete Unity (The Godhead/Holy Trinity).
The Godhead is Perfect Love - Perfect Patience, Kindness, Motivation, and Knowledge towards others and the self in the Heart, Mind, Strength, and Essence.
The Godhead Eternally lives in Absolute Peace, Happiness, Energy, and Wisdom.
Reflection on the desires of The Godhead:
Our Father wants to share the experience of the Blessings of Peace, Happiness, Energy, and Wisdom with others because of the Awesomeness of Love.
Our Father wants others to Love Freely.
Reflection on the Method by which to Achieve This:
Our Father must devise a plan which:
-grants His Creations Inalienable Rights to Free Will.
-grants His Creations Inalienable Rights to Free Desires.
-places His Creations in a state out of, but seeking Perfect Love.
-places His Creations in a state of unable to be Tangibly Guaranteed of His Existence.
Reflection on Creation of the world:
The Godhead, Perfect Love & Possessor of All, Willed a Word, which is completely supportive and completely of His Free Willed and Perfect Loving Nature, and Made The Word Flesh.
I thank you for your time, consideration, and excellent thought-provoking question! I look forward to hearing your thoughts.