I am very new to Azure. I have an Azure for Students subscription and I'm trying to create an Apache Kafka cluster using Azure HDInsight. I selected West Europe as my region. I'm using this resource as a guide: From the message you provided, currently you are limited by vCore:

Required: 26, Available: 0.

Please check what cores you currently require for Kafka, change them for some other which you have limit for, or write a ticket to support to increase your quota. You can do that by pressing this "person" button at the end of the line in quota panel.