8.

If you want to learn Taekwondo, make it sure to begin training in a dojang.
It doesn't matter even when you don't find good master. It can be good even when he dosen't teach well. It is still good even though colleagues are of low levels there. It can be fine although the dojang is full of only kids. It is better than to learn Taekwondo with only textbooks guided by your imagination.
Every dojang has its own atmosphere, basic orders, and others who watch you. There are some culture, basic course of training, colleagues who train with you and the master who is better at least than you. There are many things in it that you cannot see. You can find many factors and obtain them as far as you have wisdom to follow principles and clear object to train. You can obtain nothing where there are nothing.
If you believe a dojang is not good you may move to another.
But make it sure to train in a dojang. Particularly if you are a beginner.