caesarn,
There are CLI programs that must be accessed from the terminal, but I would think the programs you would be interested in at this point in your learning curve would have GUIs. These you should be able to access from the menu with a click of the mouse.
Fred
EDIT: This is in the wrong forum. It should probably be in the "Newbie Questions" area.
How to access applications directly without using terminal
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Don't add support questions to tutorials; start your own topic in the appropriate sub-forum instead. Before you post read forum rules
Re: How to access applications directly without using terminal
This is how I launch angband from mintmenu.