Search fund internship for freshmen

Hi everyone, I am currently a freshmen majoring in Quantitative Economics at a non-target school. I want to go into ib or other fields of finance in the future. I'm looking for internships now, and search funds came up a bit. I am looking into unpaid search funds now. When should i start applying to these, and are these internships good to do over spring semester? Are they easy to get for freshmen willing to do unpaid work? Are they a lot of work? I know most of them advertise 10-15 hours but do these internships really add up to be that much? Thanks!