I was trying to discern the pattern in your capitalizations but I failed. Is there a reason you capitalized the words that you did?
It's a good effort, in spite of the grammatical probs. Good thing God doesn't notice those things...I mean, it is a psalm of praise to him...I doubt he cares about punctuation/grammar.
"I will tell of your Greatness, your Strength, your Love and Grace,"
I like it. Anything that God has is so much better and greater than what we have, so should be capped. I do that too sometimes.