A good list of Javascript resources from the esri class
ArcGIS API for JavaScript Post Class Resources
But if you are not wanting to get into the nuts-and-bolts of JS customization yourself, you can always start with the ArcGIS Online out-of-the-box and Online Web Appbuilder (that to some degree can be downloaded and imported into the developer version if at some point you want to dig further into customization)
http://www.arcgis.com/home/
you can get a free develop account to test if you do not already have one. check out some of the videos to get a feel for what you can do online
Videos—ArcGIS Online Help | ArcGIS