Copy Editor help/recruitment

I’ve been asked by the managing editor of an OJS journal (we host) for copy editor help. They publish 3 times a year. The time commitment would be minimal and might suit a graduate student. As I search for resources and advice this week, has anyone else been asked this of an editor? I’ve shared our MoU, so we technically don’t need to provide this support. Nonetheless, this is a learning experience for me. I’m collecting a list of resources (and also checking in with one of our senior scom Librarians). The journal is based in Canada, but is international (the EB consists of individuals from multiple countries).