You have to be able to actually push the mob back, if you just buck against it and it doesn't budge, then it says in text below that you don't have enough power (or something to that effect), then you don't get any skill points. I doubt you can push back any mob in BC if you just started leveling it.
Go to outdoor maps, best I think is Mongchon where you can push keratoids or shell snippers across the province, or until they die. You don't want too weak a mob, so forget about hens in Bichon because they die on second or third push. Keratoids are best IMO because you can push them reliably and they don't die after few pushes.