Engineering curriculums are no joke, so at least for your first semester, I would concentrate on adjusting to college and not worry too much about what to do on the side. That transition from high school is a pretty big step for most people, and not one to overlook. Most people save finding a part time job for the second semester, after they have started to get their lives together, unless finance is really an issue.
Most employers don’t really hire freshmen, since they usually have very little if any engineering experience through coursework. That being said, my school (Umich) often encourages those who wish to have a study abroad experience as a part of their undergraduate experience to do it during the summer between freshman and sophomore year. That will give you something productive to do during that summer, and also something to add to your resume.
As for your resume, don’t just do something for the sake of putting it on your resume. Do something for you, not for your prospective employers. Some employers will go down your resume and ask you to discuss what you put on it during an interview, and you want to be able to have a substantial discussion, not just a one or two sentence response.