I need help… im new to the software and cant figure out how to make buildings, please help if you know how
You can’t make buildings in Unity. This is a game engine, not a 3d modeling tool. Try Maya, 3D Studio Max or Blender.
Also, you could check out turbosquid for buildings that have the file extensions (.fbx, .max, .ma, .3ds, .bland) should work well in unity. But to make your own buildings you need a 3d modelling tool. if you want a quick, free, safe one, check out Blender.