As far as getting into UCI or UCR, that would be a tough call as they are both schools that will have a lot of competition for admissions. Your best bet is to get a few more extra curriculars/community service. It will also come down to how good your ACT/SAT scores.

By UCI and UCR, do you mean UC Irvine and UC Riverside?

If you did, then that is very easy to get into. I don’t think you would have that much of a problem getting into it. However, on your application, be sure to explain why you didn’t do more community service and why only one year of tennis and stuff. You have to explain why you were not that active. However, if your SAT score is good and GPA/ranking is good, it should be fine.