I re-implemented Huracan for education purposes following the Turupawn's step-by-step guide. The guide is very easy to follow and to understand each one of steps. I had issues with the relayer because of the Private Key that in the video is not visible and in previous steps it shows the nmemonics as PRIVATE_KEY value. It's confusing and costs me some hours until I figured it out.
Besides that, the rest of the guide is very good, explaining a difficult topic in a way a beginner like me can understand.