Hello, I'm new to digital art and I've got a weird question. I usually draw on paper then take a picture to upload it on the computer, I don't have a tablet to draw on so drawing with a mouse is very difficult for me. Someone told me I can trace the picture digitally with the help of some tools then get rid of the image below. She showed me how to do it on Microsoft Paint but I can't find a way to do it on Krita. I tried looking for other ways to get rid of the image, leaving the tracing, but I can't find any other ways.
Can you help me with this?
Thanks!

If you don't have tablet then Photoshop is best choice for you to edit and create images