Open Unity Hub. Go to Installs → Install Editor and Install Unity 6.0
Create a new project
💡 Instruction with captured images
In Unity Hub, click New project button in Projects tab
Install packages from git URLs
💡 Instruction with captured images
Once your new Unity project is open, navigate to the top toolbar and click on Window > Package Manager. Click the + button and select Add package from git URL.... Paste the Git URL into the field.