Building a barbecue is obviously not difficult, finding a place in the open where it is permitted often is, always be aware of fire restrictions in your area. Sometimes there are also restrictions on gathering wood. If all else fails, use the barbecues provided in parks and camping grounds.
What is fun is of course to build a barbecue yourself. The safest place to use a home-made barbecue is next to water, whether it is a beach, river or a large bucket full of water, the wind can suddenly send the flames in a totally unexpected direction! >>> oof will show you, watch!