Hinkypunk illustrations

I've isolated the image but how do I get a transparent background?

Hi there Once I've edited my images how do i go about pulling them all together onto one page and move them around to make an art print to sent to the printer's?

Hello, I'll be grateful for any help I really struggle to get to grip with a very simple set of editing requirements... I've done a set of watercolour illustrations that I need to digitally cut out and separate from their watercolour paper background, and then save to send of to the printers. I've worked out from YouTube how to use the lasso tool to isolate the image and put in a transparent background but then I'm stuck. I tried pressing 'save as' but that just saved the whole thing including the editing suit???