GIT is a command line tool although there are graphical tools available which use it.
If you are uncomfortable with the command line then please read my command line concepts.
In my opinion the best way to start with learning GIT is to use the command line rather than immediately using graphical tools.
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Well a few reasons:
Comes back to my core values of learn things from first principles.
The command line tool doesn’t change - so it’s a lot easier to write documentation for it and know that the documentation will stay current and won’t be instantly out of date the day a new version of a graphical tool comes out.
If you understand GIT’s command line then it will be easier to understand how deployment scripts work.
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This will give you broader understanding of how GIT can help with many things like deployment.
This documentation is much easier to keep to date if we stick to teaching first principles.