Create a Window in unity with buttons on it

Yesterday was the first day for me in unity, all i want is to make window with three buttons on it and i have no idea how to do it ! I’m a c# developer but I’m NOT familiar with unity at all, can any one help me ?

PS : If you have any “links,tutorials” to help me leaning the basics about unity and scripting on it, it would be great.

You could check out the GUI API

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there is many things that you could use to create a mobile window with buttons and everything.