[Turtle91]

There are basic 'eraser' type tools in most graphics programs that allow you to first, select the primary object, second, invert the selection so everything BUT the object is selected, and third, hit the delete key to remove everything but the object.

Then you can either leave it as a transparent channel .png, or fill the background with pure white and save as a .jpg .

Then you can get your hands dirty and play around with changing the levels… if you mess something up, there is always 'undo'.

There are also plenty of YouTube videos that demonstrate how to remove the background using whichever software you have.

Personally, I would also stitch those two images back into a single image. That makes it much easier to flow the text around or otherwise manipulate.