If you notice that you're struggling through the stages of editing and proofreading, you should know you're not the only one with such problem. You are too attached to this project and it's difficult for you to see the flaws in it. That's why it's recommended for students to use an editing service that will bring their projects to perfection. This is a smart investment that will save you from embarrassment after all that effort and stress you went through.
You should normally avoid too much personal language (“I”, “my” etc), although opinions on this vary. As a rule of thumb, only use it when you are describing what you actually did and when you are expressing personal opinions, probably in your conclusion. Don’t refer to yourself as “we” unless you are describing some sort of groupwork, and don’t refer to yourself as “the author”: it’s pompous and confusing.