The Terminal Is Optional
Whether you want to install software, configure your network, or tweak other system settings, you can do it from the terminal – but you can also do it from the graphical interface. Most settings you would want to change are easily accessible in the standard graphical control panels.
If you have never tried using Linux, you may have an expectation that you will have to learn terminal commands to get around, but this has become less and less true with each passing year. Give Ubuntu a try and you may be surprised at how little you’ll need to use the terminal. Many users shouldn’t need to touch the terminal at all.
(It is possible that, if your hardware isn’t well-supported, you may have to use terminal commands. With properly supported hardware, you should not have to mess around with the terminal to make things work.)