I did a talk at the london .net meetup if you want to get an overview of what SSDT is and how to get started then I would recommend it:
https://skillsmatter.com/skillscasts/9274-londondot-net-january-meetup
This was aimed at .net developers rather than DBA's so there isn't much talk about “why you should use source control” etc as everyone in the room used source control already 🙂