Many here are willing to help.
But this is not a chat. We only work with detailed information
It sounds like you need to chat with Ubuntu u users.
You can start here:
http://community.ubuntu.com/If yu boot Ubuntu in the 'Live' mode, it does not take and hard drive space. It rums in memory. There you can resize the petition and create a new one for Ubuntu. This does not destroy Windows, but it will zap the boot loader. So you later have to 'repair' the windows boot loader.
Get on an Ubuntu chat and ask others how they did it.