Don't worry about people who get mad at you. ESPECIALLY if you are just starting off. Keep practicing and eventually you will improve. It's good that you have questions and are trying to learn. You'll get there some day.

If you want, you can try looking at videos on YouTube about how other tanks handle certain fights.

And if you have any specific questions about how to tank, just ask them here and I'm sure a lot of friendly people will help you out.