Hello @Joao Ribeiro , Thanks for the question and using MS Q&A platform.
I am assuming that you already have an active student account. Looking that the page here not all services are covered under student subscription. I did just checked and I do not see any HDInsight or Spark services.
https://azure.microsoft.com/en-us/free/students/
Thanks Himanshu
Please accept as "Yes" if the answer provided is useful , so that you can help others in the community looking for remediation for similar issues.