The order in which you learn DevOps tools will depend on your goals and the specific tools you are interested in using. However, a general approach could be to first learn the foundations of DevOps, including concepts such as continuous integration, continuous delivery, and infrastructure as code.
From there, you can start learning specific tools that are relevant to your goals, such as version control systems (e.g. Git), configuration management tools (e.g. Ansible, puppet), and containerization tools (e.g. Docker). It can also be helpful to learn how to use a cloud platform, such as AWS or Azure, as many DevOps tools are designed to be used in conjunction with cloud services.