Best practice for supporting small personal projects repos on Azure DevOps on premises

Question

I want to set an on-premises instance of Azure DevOps 2019. I read the guide for planning the organizational structure. In a situation where people have small utility programs they have written to help with their day-to-day tasks, where should I have them have placed their code. I feel like creating projects for every individual user that wants their little playground to put code would be messy. Is there a way to create a space where users have their separate repositories?