Hi!
You missed these few things...
You wrote, "Some of the benefits of taking this medication are that your depression is lessened or even eventually gone"
I would write, One of the many benefits of taking this medication is that your depression is lessened of even eventually gone.
You also wrote, "the mood changes"
You should capitalize the "T" in the word "The" because you started a new sentence.
You wrote, "the mood changes will be that our happier and less anxious"
I would write, You will experience happier and less anxious moods.
Now for the second paragraph you wrote, "I think people often avoid telling people of depression can vary from many different reasons"
I would write, I think people suffering with depression often avoid telling people of their depression because
"I could be chemical imbalance like low serotonin."
It could be chemical imbalance
"simple google search or people raise awareness"
Capitalize the "G" in the word "Google"