They easiest way to start is to install Data Mining Add-ins for Excel. They are much easier to use than BI Dev Studio (Visual Studio).
There are multiple videos and tutorials for data mining add-ins. Once you have your data prepared for modeling, creating the model is just a few clicks in a simple wizard in Excel.
To find videos demonstration data mining add-ins, you can search for "data mining add in" on youtube.com.
Tatyana Yakushev [PredixionSoftware.com]