Glad you could join the flock! Lovely rooster you have their. Yes they can be quite aggressive when you mess with their girls. Thankfully my 2 are ok and are not that fussed. The one I hatched and raised is super friendly loves lap sitting and cuddles. The other that I bought in is not so into sitting on your lap, he's friendly enough though to stroke and to check him over.
Very pretty boy you have there! Yes, I will mist my birds on very hot days. Don't get them too drenched however. Wet matted feathers can overheat them as well.
I use sand in my run. Hose the sand down and it really keeps the birds cool. Cool feet mean cooler birds. I also run a giant fan too. You can also put ice cubes in their water, feed them cool treats like watermelon or other cold fruits. Frozen 1 liter bottles of water around the coop and run and they will snuggle up to these things if they need to. Even a pan of water to stand in keeps them cool.
Great to have you aboard and welcome to our flock!