If it is just a maintenance dose of bleach you can swim maybe 15-30 minutes later. Just want to give it time to disperse in the water so you don't swim through a "hot pocket" of bleach. It is actually ok to swim in higher cl levels than you think but you just don't want to wear a new suit. Better to wear an old one that you won't care if it fades. There is no magic number to swim in. I probably wouldn't swim if it was higher than 10 in my pool but there is no set cutoff number.

What kit did you buy from Amazon and what price? I have always had really fast service any time I have ordered things from Amazon so hopefully your kit will be here soon.