Do you have any experience of hillwalking at all, Ceriwyddien?
If not, then I would recommend joining a group for high level walks; learn from them until you are confident and experienced enough to go it alone. But nothing to stop you venturing out around Staffordshire on your own - map, compass, boots or stout shoes, small rucksack and waterproofs are pretty much all you need for lower level walking; no need to spend a lot of money either.