All guides below are in portuguese.

For starts, here is the 2 guides i wrote for my fellow brazilians:

Part 1 - https://steemit.com/pt/@phgnomo/guia-steemit-o-que-aprendi-em-1-mes-na-plataforma-parte-1
Part 2 - https://steemit.com/pt/@phgnomo/guia-steemit-o-que-aprendi-em-1-mes-na-plataforma-parte-2
Translation of the tutorial How to register on MSP/PALnet - https://steemit.com/minnowsupportproject/@phgnomo/tutorial-de-registro-msp-palnet

Plus here is the guides other fellow brazilians wrote:

What is and How to Join minnowsupportproject - https://steemit.com/pt/@casagrande/voce-ja-conhece-o-minnow-support-project
What are and How to use the steemit keys - https://steemit.com/pt/@robertoueti/o-molho-de-chaves-do-steemit-aprenda-como-usar
Analysis If the Brazilian community on steemit - https://steemit.com/utopian-io/@lpessin/analysis-of-the-tag-pt-portuguese-language-community
Tips for steemit newbies - https://steemit.com/pt/@defremont/dicas-para-novatos-no-steemit
Video Guide on How to create and steemit account - https://steemit.com/steemit/@rhavi/como-criar-uma-conta-no-steemit-e-ganhar-dinheiro-postando-comentando-e-curtindo-or-guia-do-steemit-1-video
What to write about on steemit - https://steemit.com/pt/@belzunces/sobre-que-assunto-escrever-no-steemit-dicas-de-um-iniciante
Definitive guide about steemit - blockchain - https://steemit.com/pt/@robertoueti/guia-definitivo-do-steemit-duvidas-gerais-blockchain
Definitive guide about steemit - reputation - https://steemit.com/pt/@robertoueti/guia-definitivo-do-steemit-duvidas-gerais-reputacao
Definitive guide about steemit - plagiarism, spam, abuse - https://steemit.com/pt/@robertoueti/guia-definitivo-do-steemit-duvidas-gerais-plagio-spam-e-abuso
Definitive guide about steemit - voting and curating - https://steemit.com/pt/@robertoueti/guia-definitivo-do-steemit-duvidas-gerais-votando-e-curadoria
Definitive guide about steemit - economy - https://steemit.com/pt/@robertoueti/guia-definitivo-do-steemit-duvidas-gerais-economia
Definitive guide about steemit - commenting - https://steemit.com/pt/@robertoueti/guia-definitivo-do-steemit-duvidas-gerais-comentando
Definitive guide about steemit - posting - https://steemit.com/pt/@robertoueti/guia-definitivo-do-steemit-duvidas-gerais-postando
Definitive guide about steemit - community - https://steemit.com/pt/@robertoueti/guia-definitivo-do-steemit-duvidas-gerais-comunidade
10 useful tips about writing a good post - https://steemit.com/pt/@wiseagent/steemit-10-dicas-uteis-para-escrever-um-bom-post
Definitive guide about steemit - accounts - https://steemit.com/pt/@robertoueti/guia-definitivo-do-steemit-duvidas-gerais-contas