I was Terminal-only for a while too. But for a simple GUI that speeds up your most common operations, I have to recommend GitKraken.
I still hang onto my terminal for when I need it though. GitKraken doesn't cover everything that, say, SourceTree does, but its GUI is much cleaner and I'm already comfortable enough in a terminal that I'm fine doing the more advanced stuff that way.
As an aside, I'd recommend being comfortable with git CLI anyway. Trying to learn with a GUI alone tends to hide a lot of the important stuff.
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