All building in Fortnite starts with picking out a landing spot and starting to chip away at objects in the environment for building materials. The three types of material players can find and use to build are wood, brick, and metal. Each has a different strength value, starting with wood, which is the weakest but fastest to build and ending with metal, which is the sturdiest but takes the longest to construct.
Outside of which materials players scavenge the environment for, it's also important how they start chipping away for those building materials. Most materials come from usual sources: wood from trees, brick from walls, and metal from cars, but a key part of taking a pickaxe to harvest building materials is to aim for the highlighted circles, since hitting them will double the materials gained.
The last essential tip for building in Fortnite is to customize your controls. On PC, this is as simple as binding keys specifically for building frequently used objects and building edits, whereas with a controller, Fortnite players can toggle into build pro-controls, which map various buildable objects on the shoulder buttons.