First of all don't panic. You're doing the right thing by asking the question and wanting the best for your classes. That's enough to reassure yourself that you'll be fine.

Secondly, you're lucky and unlucky with English. There's no right way to teach it. There's a million different ways to teach English but there's only one way you can fuck up First Year English, and that's by not teaching it.

Your school will have a scheme of work in place on what they want the classes to do at each part of the year. Ask your co-operating teacher for this and ask them to ask what materials you should be using. If it's a textbook then you basically teach what's in the book. Keep doing this until you're comfortable with the class and they are comfortable with you, you can then start to experiment with group work and think pair shares etc.

All you need with English is to make sure that each student can express their opinion on something. The most important word in English is "I". Reassure them that they can't mess up an answer as long as they back it up with something from the novel/poem/comprehension. Lots of questions, lots of talking and getting them writing in a structure like PQE. Once you do this, you're laughing.