HANDCRAFTED SOFA / BENCH is actually very stylish and something almost anyone with basic skills and tools could do. Buying cushions would be end harder part and the expensive part. Unless you know how to source foam and make cushion covers.
Trace photos and wall art in craft paper then you can play with the arrangement on the wall before nailing in the pictures and know where to put nails. I do this for everything I hang on the walls - saves me from having multiple nail holes!