The most important thing to UCs are grades and course rigor for sophomore and junior year, so that is what to focus on first. No one need to do any sports if they don’t care to. President of a club is fine but you can do other things. ECs don’t just have to be in your school. I don’t know why you would take UC off the table and ‘give up’ for what seems no reason, but but there are plenty of other schools to apply to.