Teaching by yourself in the TEFL world is not very common. Most schools which employ TEFL teachers will have more than one teacher in their staff body. Usually you’ll meet a mix of foreign teachers and local English teachers.
If you’d prefer to know you’ll have foreign English teaching colleagues, steer your job applications to language schools more than public schools.
Premier TEFL internships are designed with group start dates for TEFL interns, so you have an instant community of new friends.
Being part of the TEFL world connects you with a global community; we encourage you to make as many local friends as foreign ones. After all, getting to know the locals is how to find the best places to eat, explore and have a truly authentic experience!