Computer Room Design

I would like to design my own house, for fun at this point, maybe use it later. Does anybody have any clue what software or program online, preferably a free one I can use to do this? I would appreciate any help at this point, Thank you.

I am working on a storyboard for my decorating class. Can anyone help me?? I can’t find a thing on line! I have to have 1) a floor plan of a bedroom 2) co-responding fabrics that I would use and 3) a legend.
Here’s my problems:
1) It is a 1D drawing of the room with the use of stencils for the bed, lamps, (the actual furnature only) etc. How do I show the corresponding fabric I would use for the pillows since I am not supposed to “draw” them onto the actual floor plan of the bedroom?
2) I have only ever done square, simple rooms before, so showing the wall measurements was easy…now I have a balcony, on-suite and walk-in closet? All I have to do is a bed-room..but I wanted to do more. So, do I show the dimensions of everything? If so how? If not, how do I show the dimensions of the bedroom without making the floor plan look too messy?!
Sorry for such a long question, but I knew if anyone could help, it would be you guys! PLEASE help me!
caught doing what……..?? I don’t understand….

Like when they are drawing a room and designing its interior… what software is used for that?

I’ve decided I want to design my dream house. I think the only way I can do it is to actually draw everything out (blueprints, exteriors, etc.). I have photoshop. Any good tips for completely designing a house from the ground up? Or do I just open up a large drawing surface and draw it all room by room? Thanks.

I need a software (a free one) to decorate my room.