Functional martial arts are those that are effective in real-world situations and can be applied in self-defense scenarios. Quality teachers are those who have extensive knowledge and experience in their art, have a strong focus on safety and proper technique, and can effectively teach and communicate their knowledge to their students.
When choosing a martial art to train in, it is important to research the art's history, philosophy, and practical applications to determine if it aligns with your goals and needs. It is also important to research potential teachers and schools to ensure that they have the necessary qualifications and experience to teach the art effectively.
Overall, the key to success in martial arts is to choose a functional art that aligns with your goals and needs and to train with a qualified and experienced teacher who can guide you on your martial arts journey.