Inscrivez-vous ou connectez-vous pour rejoindre votre communauté professionnelle.
1). First you need to choose the subject you wish to teach.
2). Gain knowledge, experience & certification in the chosen subject
3). Start teaching a small group of students/ family members/ neighbours to gain confidence
4). Apply in institutes/ schools after checking your eligibility and their requirement
First of all the grammar in your question itself is wrong. So please correct it first and then you can join in a course which varies in all countries to become a teacher in various levels(school & college). After that you can be a teacher according to your course level.