The length of time between beginning the study of yoga and teaching yoga varies greatly from individual to individual. I some cases, you'd practised yoga for over 20 years before becoming a yoga teacher. Others may make this transition quite a bit sooner. However, my recommendation would be to take more time to work through the postures in detail, before attempting to teach them. Along these lines I would recommend studying Yoga yourself with a competent teacher. Also, consult with this teacher as to their opinion when it might be appropriate for you to begin teaching yourself. If you study regularly with a competent Yoga teacher, they get to know you and your abilities. Hence, they can help you decide when the time would be right to begin teaching. Remember that teaching yoga postures is different from a personal Yoga practice. You need to understand each posture in quite a bit of detail to be able to give appropriate cueing and instructions to the students. This would also include aspects of Yogic breathing, meditation practices and principles of posture sequencing. Prior to teaching, it would be important to obtain some training on the practice of yoga teaching and yogic philosophy. Here, signing up for a yoga teacher training course would be a necessary step. In this respect, the yoga teacher training course can provide a thorough, in depth, and convenient way to obtain this training. You can find information on the internet regarding these course.
While it is not too early to begin to plan a path towards Yoga teaching after 1 month of practice, it ds take more time to develop the knowledge and experience base to be a competent teacher. Also realize that Yoga learning is a lifelong process as it is an immense subject. Although practising now for 23 years, I am still learning! Nevertheless, I would strongly encourage you to pursue your passion but with the skills necessary to be compenent teacher.