Couple of days to get basic commands to muscle memory and to get intuition how git works internally.
Save yourself from confusion and waste of time, and read/skim through the Pro Git book. It has very good diagrams explaining the workings of git. As of 2025, the book is a bit dated for the very latest (unnecessary?) commands of git, but the basics are still the same.
That said, git is the de facto version control tool in the industry, but I prefer Fossil for my personal projects. Nothing beats the timeline view and other simple tools and easy customizability in Fossil.