You can also go to major swimming venues. Every April, May, June and July, there are special research trainings (lifeguard certificate, coach certificate). Usually a batch of training is completed in a few days. You can talk to the leader or coach in charge of this. It should be no problem to find some good students. And most of them want to find a job in this field. They have jobs delivered to their homes, which is welcome. These people usually have to pay. two-way selection