Please correct this paragraph

While my aunts, uncles and cousins were visiting; we went fishing, had barbecues and spent time enjoying downtown Portland. One minor setback was that one of my uncle’s cars broke down we spent the day waiting around an auto-repair shop for the mechanics to replace the carburetor. The last week of summer was a little sad, my relatives left and went back to their respective homes but I’m glad to be back at school. I feel better prepared for school this year than last year. I’m nervous about applying for collage, I would really appreciate any help you can give me to prepare for my stressful senior year.