About the Breathing part, it gets a bit deep.
God created with His Breath, mans soul. So all Three were producing as man was created. The Thought the Master Mind in Creation(imagination visualization, higher Education), The Word of all Life needed to understand and make sense of the Thought(Wisdom, Speech), The Breath which gives the ability to speak the Thoughts and Words given. Also, the Breath is Love and Sanctification. The Holy Spirit is the Sanctifier of God, that is His task. He is present wherever the Others are as they are unified or United in One.
This is a short summary as I'm a poor soul who just is not a "doctor" of the
Church. This is how I was shown during my deep meditations. It goes in line with many of the "doctors" of the Church and what is sometimes not so hardlined in the Catechism or given more words than few. Now about explaining God, it is requires a lot of pages. Because God is infinite and requires a lot of time to contemplate over many months, thus many quit because they do not have the patience. Perservere and you will receive. Because God will not give to those who just ask for the sake of asking. But to those who "Desire" to Know and Love Him. That's what Heaven is about. For those who want To Be there for Him.
Peace


