I’m not a parent, but I watch what some accomplish and it’s clear that time is illusory. I watch them tackle so much in a week it makes me want to take a nap.
When driven, we just get it done. If we do don’t really have to and don’t want to, then we probably won’t.
Thus, it might be a good idea to stop telling your self that you will do it when you have more time. It’s possible that it just isn’t something you want to make a priority right now.