well i think OP is trying to say s/he didnt do anything that required heavy involvement or serious commitment (i.e. nothing he could put down on a resume/application) during his/her freshman year. I think thats fine as long as you find something you really like to do sometime soon. like someone earlier said, most people don't really start getting involved in undergrad until soph year. id try and have an idea of things id want to do over the year (research, volunteering, music, sports, teaching/toutoring, w/e) before the year starts and make a serious attempt to start those activities in the first few days/weeks of school).
i dont think i did much first year either, but i'll add a few more things this year for sure
and your summer job is perfectly fine- i think most schools dont want cookie cutter premeds who all have the same extracurrics. real world experiences outside of volunteering in hospitals and lab work is great as long you come out of the experience having learned something or gained something noteworthy, imo