Welcome to DharmaWheel.
Yes, you'll need a teacher. I'd look for a teacher outside the NKT. Take your time and explore. There are many opportunities in your part of the country, which is fortunate!
Everyone has serious faults. Use them as motivation to learn and grow and develop. The Buddhist teachings have many specific methods for dealing with such hindrances as hatred, greed, and so on. It is good to recognize those bad habits in order to work with them effectively. Your teacher can guide you through this process.
What to do next? Read what interests you, but read widely throughout the Mahayana world, across traditions. Visit many different temples and practice groups. Introduce yourself to teachers in your area. When you find one you can work with, one who will take you as a student, you'll have your direction.
Formerly Jikan. Fast and bulbous. Tight also.