someone who decorates or repairs their home, or makes things for their home, rather than paying someone else to do it for them

A drill is a basic requirement for any DIYer. 电钻是自己动手搞装修的人的基本装备。

Plastering over a large area is probably not a job for the first-time DIYer. 大面积地抹灰泥可能不是第一次自己动手搞装修的人能胜任的。