For a quicker photo-to-sketch conversion, you might want to try out previously-mentioned software Photo to Sketch.

You can convert your image into a colorful sketch or use monochromatic tones to give it a realistic feeling. You also have the choice of watermarking your finalized photo so that no one else can ...

You can draw on an iPad with an Apple Pencil on the Procreate app, which you can use to sketch, paint, and illustrate.