Build a shed - how?

Start with the base, that's what decides whether the doors still close in five years. A level gravel pad or concrete blocks, with pressure-treated timber for the floor frame. Before buying anything check what your council or town allows without a permit, there's usually a size and height limit. After that it's floor, walls built flat on the deck and tipped up, then the roof. A kit is less faff for a first one.