90% skill, 10% tools, if that. If you don't get a shaving edge on the sharpmaker with the diamond rods, you don't get them with the finer rods either. DIYknife, I'd suggest that you practice with what you have, a different set up is most likely not making it easier for you although I have to agree that a non-powered option might be better at first for you. You could practice on the WorkSharp with cheap knives first, read the long thread here on BF about it (to not round the tip or to not create a recurve for instance).
If you want to go the "freehand"/manual way, IMO the best setup is a coarse oil or waterstone (Norton crystolon or a Nubatama Bamboo 150) to be able to reprofile a knife to a usable profile (thinning, less than 15 dps), then finish on the sharpmaker with the stones that come with it (the brown and the white = coarse and fine). That will give you an edge better than you ever need and this set up will teach you a lot about sharpening movements, burr, burr removal, feeling for angles etc. So for about 80-90$ US this can be had and lasts a very long time.