3D House design

hello,
today i was tring to learn how can i made house near the water body in blender,and the image below is final render of it in 60fps .

so in making this house first, i have made walls of it and I determine the opening of window and doors

and after that I have modeled door and window which fit opening spaces
and after that I made the roof of this house and slab , I also made a scene of representing it near a water body

                     THANK YOU