You won’t, can’t , and really don’t need to know everything perfectly. Just start with the thing that looks the most interesting / accessible to you. go down the rabbit hole. Come back up, go down another. When you start getting bored, start producing some stuff. there will always be opportunity costs no matter what you chose to do. Just try to enjoy what you are doing. Another trick is to copy someone you respect. Try to learn what they know. And when you know more than them, find someone else to copy. One day people will start emulating you.