At the beginning, we recommend two classes a week, progressively reducing to one a week, one every two weeks... It depends on how you work and evolve, how you feel and your autonomy in practice. As for practicing outside of class, it is recommended that you find a space of 10-15 minutes a day. Think that the most complicated thing is not to produce the new element of pronunciation in isolation, but to integrate it into your Spanish and stop doing what you have been doing for some time, that is, to change your habits.