The terminal is super-useful thing, which much simplifies your life in Linux. So since you often have to meet with the console, then I would recommend a bit to customize its appearance. I am sure that many already know how to do it, so this article is devoted to new users.
Sorry for the spelling and phonetic errors in the text.
Owner and main writer of MintGuide.org is not a native English speaker.
To start the Terminal you can press Ctrl-Alt-T, or by entering in the search menu the word "terminal", without the quotes of course. You will see this window to enter various commands.
Go to menu - edit - Profile - edit - General tab. In this tab you can change the font. Then go to the tab - Colors. Remove the check mark from the "Use colors from system theme".
you can choose your own color combinations or choose from existing options on the menu - "Built-in schemes". Then go to the Background tab. Adjust the transparency to your taste.
You can create several profiles, which will be changed fonts, transparency, background and text color. Give a name for each profile in the General tab. After that you can change these profiles from the Terminal menu.