#clorox pool & spa shock

Hi everyone! New here, first post, please be kind haha. After 1.5 arduous weeks of trying to get my pool filter up and running without flooding the entire block, I have finally attempted the impossible and this Frankenstein is alive! (I got 75% of a Bestway power steel 24x12 with sand filter...

I am using Clorox Pool & Spa 32312CLX Shock Plus. (once every two to four weeks) It says "swim-ready in 15 minutes" but can I use it after 15 minutes? Can I believe it? I wonder if sodium dichloro can actually swim after 15 minutes or if it's bad for our bodies. When I look up the relevant data...