If you only care about the shower in the morning, get a Thermostatic Shutoff Valve (TSV). Sounds much more complicated than it is. You let your shower run until it detects hot enough water, then slows to a trickle. You pull a small hanging cord and it opens back up, hot and ready shower. They're like $20. We've had one for years and works great. It's dumb, but it works.
If you only care about the shower in the morning, get a Thermostatic Shutoff Valve (TSV). Sounds much more complicated than it is. You let your shower run until it detects hot enough water, then slows to a trickle. You pull a small hanging cord and it opens back up, hot and ready shower. They're like $20. We've had one for years and works great. It's dumb, but it works.