Parental controls and iCloud settings

I just tried to make parental controls on my son’s new iPhone and also make some controls on the iPad my other son will use for school. All of our devices are linked through my husband’s iCloud and now all our devices have parental controls. First, how do I fix this? And second, how do I manage my kids’ screen time without making my husband and I Have to do too much extra work, or have inconveniences on our phones,

Thanks

michele