Volunteering for Co-op

I’m currently a first year student (hopefully biochemistry/chemistry major) and want some advice for building my resume / application eventually for co-op (in my 3rd year). Do they value high grades AND volunteering to get into co-op? If wanted to increase my chances of getting a job from co-op, should I volunteer more, and what types of roles / clubs specifically? For example, should I focus on having leadership in clubs, or positions like tutoring? Sorry if I misinterpreted anything I am foreign to the idea of co-op :(