Yes, you can teach English abroad as a fluent English speaker!
TEFL teachers are expected to have a high fluency in spoken English and strong written English. Many schools ask for a B2 level and higher when advertising TEFL jobs. Taking an IELTS or a TOEIC exam will be useful for non-native speakers when applying for TEFL jobs.
Here’s your personal guide to getting hired as a non-native TEFL teacher.