Hi Federico,
I like your portfolio!
Some good and some bad ideas, your visualizations are great.
Overall your designs work, you have a good feel for proportion and materiality. I would focus more on making more impact conceptually, for example creating more expressive and unique forms, encouraging conversations about your pieces and seeing also how the interaction flow can contribute and how the products communicate themselves.
Also see if you can neatify your English writing, there are lots of spelling and grammatic errors in here.