The plumbing courses cover all the aspects that you will be required to deal with as a bathtub repair. You will be taught about the basic aspects as well as about health and safety issues and sanitation.
When you get to the house stand if front of the toilet and locate the water shut off valve. Should be down below the toilet on the wall. Just turn it off (righty-tighty) completely and flush the toilet. All the water should have left the tank, well at least most of it. If there is remaining water line repair get it out with paper towels or a rag. The important thing is that no more water came in. If it did then your valve is not shut all the way or not working and you need additional help.
Plumbers are at a high risk for health problems. This is because they are regularly exposed to many different illnesses and infections. They can contract psittacosis and histoplasmosis from the regular contact they have with animal droppings. Plumbers also see regular exposure to harmful chemicals and elements like lead and the other chemicals that can be found in the plumbing materials they work with on a regular basis.
Getting advice from someone who has not made any money online is like asking a plumber to shoe a horse when they have never done so. Why in the world would you do this?
The water line repair most likely damaged your electrical outlets and lighting fixtures. Have a qualified electrician come in to evaluate and repair the electrical.
Plumbers, contractors, landscapers, and related professionals are often indexed by numerous online websites eager for you to visit their "directory". Each field will have their own group of websites competing for your attention. In the end these "Plumbers Directories" are often incomplete, and frequently provide little more information than the phone book.
In short, the emergency plumber you hire should be from a reputable company. If you think that you can rely on him then you should look for another one. An emergency plumber should be skilled and should be able to deliver quality services to everyone.