Practice, the more you use them the easier they become. I never studied them but knew when to use them, then just tinkered and iterated until the pattern did wh

Practice, the more you use them the easier they become. I never studied them but knew when to use them, then just tinkered and iterated until the pattern did what I needed it to. After a while you can mostly just write and read them without much tinkering. Regex101 is an excellent tool.