How to move images onto a canvas

I have one UI image on the canvas and 2 UI images, and 2 buttons off the canvas. I would like to move both buttons onto the canvas after 5 seconds of the scene being loaded. Then depending on which button is pressed, an image off the canvas will be moved onto the canvas and the second image to be followed 3 second later

I have little coding experience and the whole body of code would be appreciated