I let them out for a little bit while I was outside, I’ll make sure to close them when I’m not there...
I think the point @Folly's place was making was to keep your chickens out of sight of the hawk for 10 days. Then the hawk might lose interest in your area and move on to other hunting grounds. If you let your chickens outside when you are there, the hawk will see them and know they are still on the menu. Also, there are YouTube videos of hawks swooping down and taking a chicken while the owner was only a step or two away from the hen. So I don't think your presence in the yard with your chickens is much of a deterrent.
I have my chicken run covered with bird netting on top. It's very cheap. I got my bird netting from my local Fleet store, but Amazon sells a variety of sizes at reasonable prices. I live on a lake and we have hawks and Bald Eagles overhead all the time. So far, 3 years now, no attacks on my chickens in the bird netting covered chicken run.