I have a previous video with many notes in the comments, that I may edit and post here as notes also. Note that a tree (or egg) has the complete life -ability or power in it right from the start. That is, a tree, from the start or always had/has the ability to produce the fruit, the seed/root and hence the entire tree, otherwise, the tree life would not exist/grow because it would be lacking the fundamental "know how" or "life ability". Each part is essential to that 1 tree, and each part is essential to the other two parts.
You do not need to know this Trinity concept analogy/explanation in order to have Salvation. It is some inspired knowledge that may help you explain/prove/verify it to others who doubt the Trinity. It is said that the Bible explains itself/self-explanatory and
our explanations are not guaranteed as truth. God wants us to accept him through faith rather than half-proven understandings or duress/force/lack of true understanding.
Our 1 God is said in the scriptures to be Father, Son, Spirit. These are eternal/deity. They
have always been with/part of God. Each could be called a "person/ability" or "presence of God". For example Jesus is often called "God with us". The Spirit of God can be called "God in/through/upon us". Father God could be called "God above, leader for us".
God is a "spirit being" in the spiritual realm, hence God is not in the physical realm/kingdom.
Angels were created by God, they are also "spirit beings". God says Word because he is Word. God is his Word. John 1:1. [Perhaps Word can be thought of as the thought of God, which comes from the mind of God, so in a way, Father God is the mind of God, and Jesus/Son of God is the voice/Word of God].
Also remember that God is said to be "omnipresent" or "everywhere at once" which is perhaps more difficult to know/explain/understand than the Trinity concept itself. It is said that God is a spirit or "spirit being".
When someone says "Which came first, the chicken or the egg", say: "neither, since
they must coexist to assist each other". Consider that in the egg is a growing/complete chicken to be, with more eggs (or "egg (life) ability, or all things chicken") in it.