i think the main thing is that you understand that you can float after that it is all fine :D
something like this, not sure is that exactly that model, but it looks like it https://www.aliexpress.com/item/32996742919.html?spm=a2g0o.productlist.0.0.7845443fMbCuV0&algo_pvid=b9232e00-1242-43b7-9f15-5cf317135db6&algo_expid=b9232e00-1242-43b7-9f15-5cf317135db6-2&btsid=0ab6d69f15924895950688240e3d84&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_ used it for 6 months almost every day and worked fine.
Oo that looks cool. First time when I heard about this lol. Must feel so cool to listen to music while swimming. Here they play their own songs inside the swimming facility. But it is nice to have these, I would put podcasts to listen to. Thanks😊