Finally, I can show my first site with Trellis/Bedrock/Sage. It is very simple and it try to follow the customer style.
For now, is my best. As an old school designer (I'm not a web developer) I had to learn everything (Sass, PHP, Composer, Vagrant, JS, Node, Gulp, GIT... I did not even know about wordpress customization) and I have a lot of things to learn yet. Here in Spain this beheavior is called as "taking the plunge". I almost went crazy and, incidentally, also roots developers with irrelevant or absurd questions. Thank you all for the continued support. I'm still learning.