Where should I begin?
Try solving the long words first. Also try looking for words that are likely to be there, especially words that may be relative common given what you’re trying to do.
Are the coordinates important to solving the puzzle?
No, they point at a place whose name relates to the solution. That name was intended to be a hint as to how to interpret the five lines of the solution. However, I found that hint was more confusing than helpful, so I spoiled that reference by making the directions more explicit.