Not to be rude, but the common rule of thumb is to avoid talking about the death of a relative, especially a distant one like your step-grandmother. It is just too common.
I have never heard that rule. It makes sense, though, because it can be one of those situations where someone seems to be using the essay as an opportunity for some therapy instead of writing something that has value for others. Yet, I really think that even though it is common you can write about a death as long as you show the "moral of the story," the insight you derive from the experience.
Paragraph 2 has too much story. Revise the end of that so that it gets back to the point of making sure sufferers are informed properly. Let the example of your grandmother be a powerful example to support your main idea. Was she insufficiently informed? If so, discuss that in paragraph 2.
Revise this so that you write directly about the issue. Articulate that issue, Jorge, so that the essay will be about the issue rather than your grandmother. Using your grandmother as an example is very, very good, but make sure you express (in the first paragraph) the 'issue of importance.'
Good luck, friend!