For someone nervous to take the leap and move to and work in a different country, Ninja Teacher is an excellent choice. They give you a sense of community and make you feel extremely prepared for teaching. Honestly, probably more prepared than you'll need (considering the standard of teacher/employment here). However, you should care about giving the best support to your students as possible so don't be upset you paid more to be more prepared than other teachers. This course is extremely focused on teaching young learners at English centers though. So if you really know you just want to teach adults I might go a different route. They give top notch instruction on life in Vietnam though and help with so many essential basics. The help they give you job hunting is extremely valuable. Overall would recommend.