It's a tough hobby for those who like a controlled and predictable world. Fish and tanks have lives of their own. But it gives us all the weirdest questions to try to find answers to, and to find more questions from. Every answer leads to more questions!
In time, if you are a close observer, there's less panic as you realize you are doing things well. Then the curiosity takes over. Hang in there, and ask away. We all tend to have the same questions but we don't always articulate them.