How to learn to dance Tango? 

Slowly. Knowing that it is a path of learning without limits. We should not expect to be able to dance well, comfortably and with personality, in the short term. Instead, we can set partial goals. For example: to be able to walk with a musical sense and to achieve good communication with who we dance. 

Then, we can set other objectives to achieve. 

In the end, you will realize that Tango is life.