You may try approaching those Learning Institutes, I believe they do have some proficiency test etc to determine your qualities and capabilities to teach.

You may also try advertising in the classifieds as English tutor. But you must know the income is relatively low and unstable especially as you're a newcomer.

However I've seen and known some who are doing really good and making a comfortable living being private tutors, but it does take time to build your clientele and network.