I'm a Boy Scout and I need help with a blueprint

I'm working on my Eagle Scout project, which is building a handicap accessible bridge at our favorite pond over a ditch that separates the parking lot and where all the trails begin. I need to get this project approved by the scouting board but I'm having the hardest time making a blue print for the bridge. https://docs.google.com/drawings/d/1wGG0aRYgM2JKfujfyRb6vCOsAUSrIwirGh24Q-iuojI/edit?usp=sharing

This is literally the best I can make and my deadline is coming up fast. If anyone would care to help me put and remake this design in an easier to understand blueprint I would be very greatful.