Temps sound good. 👍 With a heat plate and moderate room temperatures your risk of pasty butt should be minimized. Sometimes they get it from shipping stress as well, so as long as it seems to be under control I think you should see less of it as time goes on.
Grit doesn't have to be a daily...
Your routine sounds fine, it's more time than I spend with chicks and I consider my flock tame enough. Some birds will never like being picked up but as long as they can tolerate handling that's enough for me.
What's your heat source? If using a heat lamp, what's the hot/cold temps inside the...