I agree that parenting is a challenging and relentless journey! Some of my fellow parents here have shared really good resources, including the ones mentioned above.
As for YouTube channels, there are quite a few that focus on crafts and activities for kids. My little one enjoys watching Crafty Carol, and her favourite is probably CBeebies. They both have a wholesome, feel-good vibe with lots of colourful visuals and gentle music, perfect for the little ones. I like that they encourage creativity and use easily accessible materials. For slightly older kids, National Geographic Kids and NASA have good YouTube channels, too, which are educational and fun. They cover loads of topics and can spark curiosity and conversations on different subjects.