Hourglass

I've been doing my own research on religious Taoism and haven't gotten too far, so if anyone knows about religious Taoism some info would be greatly appreciated! (I'm going to list some questions here if anyone can answer them) 1. Is there a hell? (There are many conflicting sources) 2. Any mantras for religious Taoism? 3. What deities deal with medicine, nature and protection?