That's one of the things you learn while playing KSP, orbital mechanics are quite different from the standard SF "go where your nose points" space travel. Escaping the orbital pull of Kerbin means most likely that you are just in a solar orbit now, one that is probably almost the same as Kerbin's. Seeing planets is difficult too. It's not like in those cheap space backgrounds with half a dozen planets in view as soon as you break atmosphere. Seeing a planet as more than a white dot means you are damn close.