Hi, first of all I would like to thank Fran for always being there, solving our doubts.
I decided to do the Master, since I was working with Drupal 7, and I saw that there was an important jump to Drupal 8.
Logically, it takes a lot of effort to pass the 3 parts of this Master, especially if you are working at the same time as in my case. This meant that for a while I couldn't do anything and it took longer, but without a doubt, it is worth it.
In my experience, the most complex part is Back-End, as there are many things to learn quite complex.