Articles about technical careers, interviews and job hunting.
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Short answer: Git is a program on your computer that records the history of your files. GitHub is a website that stores copies of Git repositories so people can share them and work together. You can use Git with no GitHub account; you cannot use GitHub without Git.
Short answer: two to four weeks for the basics, three to six months to build real things, and four to twelve months to be job-ready — driven almost entirely by hours per week. Five hours weekly puts job readiness around a year; fifteen to twenty pulls it to four or six months.
Short answer: if you already work in IT, start with the Solutions Architect Associate (SAA-C03). It costs 150 US dollars, takes six to ten weeks of study, and appears in more job postings than any other AWS credential. Take the Cloud Practitioner first only if you are completely new to technology.
Short answer: most people reach junior DevOps level in 8 to 14 months. Learn in this order: Linux, networking, Git, one cloud, CI/CD, Docker, Kubernetes, Terraform. Employers hire on demonstrated work, not certificates — three real projects beat five exams. No computer science degree is required.