I NEED SHEET METAL EXCERCISE FOR PRACTICING

Check my library, you gave me an ideas, I have a ton of tutorials to share, I will start by uploading the training fles and video for each tutorial for sheetmetal.
If you cannot watch the video (The flv file, then download and install VLC viewer.

You are better of designing some sheet-metal items yourself. Copying another's work has less value than learning how to design sheet metal products yourself, from concept through to a manufactureable design. There are plenty of items made from sheet-metal, electronic equipment cases, tool storage cabinets, household appliances. Along with the CAD part, if you desire to learn how to design practical sheet-metal components you also need to understand the tooling and methods of manufacture to produce good sheet-metal designs that someone will pay you for producing.