In Ps, the first drawing, lines are more shaky, that's why there are much more lines, to highlight the appropriate shape. But it's still a nice looking drawing, not a poky ugly one, though you are struggling more to do it. There are softwares that help you draw real natural lines, so no more hard lining in Ps:) which is more helpful for graphic, photo editing etc.
There I used pencil on paper for drawing them. It was in 2008
Then I scanned it and painted in Ps CS 2. One of the greatest things in drawing digital is the possibility to make layers for different elements of an illustration.
Here I couldn't colour under the out line. Becouse at that time I had not been drawing with a graphic tablet of my own, yet. Nevertheless I had some time of experience in with graphic tablet, as having worked at NetRom Company a couple of years before, as digital painting illustrator.
And this is coloured above the scanned drawing photo layer, with the mouse. It is a pain, but still a pleasure if you know it will look good and you like painting, of course.
Drawing for a boy riding
Graphic tablet Wacom Bamboo, drawing with software PS.CS.3Would it be enough Ps? as it seems we need something more. There have appeared more other performing various programs, more reliable at least as line drawing.