If you can drop the room temperatures that would be ideal, at least 10 degrees or more cooler than what the "recommended" temps are. I see you have a heat plate, that IS the heat source, so no reason to heat the room on top of that. The chicks should be able to get away from heat when they don't need it, which is a good 50% of the time at this age.
So this might seem a bit "jump the gun" to you, but what were your integration plans? Assuming you're somewhere where it's currently summer, you could opt to raise the chicks outdoors instead if you can run power out to the coop/run location. This will also let you speed up beginning of the integration process, eliminate any fear of mess indoors, and give them all the mental stimulation in the world.
Since you've mentioned reading your way through articles, here's some food for thought for brooding outdoors (if your set up is safe enough and spacious enough) for setting up for early integration:
https://www.backyardchickens.com/articles/short-on-time-recycle-a-prefab-brooder.73985/
I provide grit immediately (2-3 days old). I also brood outdoors so the chicks will put every sort of dirt, wood, grass particle in their mouth that they can find, so grit helps them break down any of that that they consume.
They will enjoy the option of a dirt bath if one is provided. It may get messy indoors but if it's just 1" of soil that's not much. Other reason for doing so is to begin exposing them to microbes and bacteria in your environment to help build up their immune system.
Here's some 10-day-olds enjoying their first dust bath outside of the brooder:
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