The wheel had another wheel inside it, and there were eyes in the wheels. The creatures' wings were lifted and touched each other and Ezekiel heard the sound of them. The sound of the wings was like the sound of the ocean or great waterfalls. Above the heads of the living creatures was a throne which shone like sapphire and great light came from it.
Ezekiel fell on his face when he heard the sound of God's voice. God commanded him to get up on his feet. Throughout scripture this is a common response to the majesty of God's presence. Daniel fell before the Messenger who spoke to him; John "fell as dead" in Revelations; Abram also fell before the presence of God. Gen. 17:3 Many other instances are cited and Ezekiel repeated it twice.
I don't think this is something you can practice and prepare for: It is rather something you can't avoid. Standing in the presence of God, witnessing his power and authority takes the breath from the body, reduces humans to utter humility, without even strength to stand. Then like Daniel and John, we will be revived by the orders of God to stand on our feet and face him. I'm guessing that's not something you can plan or prepare for either.
Read Ezekiel 1to begin to understand this great mystery and what awaits us in the future.