A very good friend of my D graduated in 3 years and went right into a top 30 law school on a full tuition scholarship. He is a rising 2L now and is interviewing next week with some heavy-hitter firms for a summer associate position for next year. (Note that he did very well his first year.) He did get involved with political organizations over the summer while in college which likely helped his application. I don’t think you have to worry about graduating in 3 years being a hindrance to your app. You should seek out meaningful internships or jobs though, and you should be forming relationships with professors so they can write you a good recommendation.