If you're jumping in to an existing project, the first thing you'll want to do is run this:
mdm update
That's it: the 'update' command is generally a one-stop-shop that tries to put your current workspace in shape. You can read more about the update command in Section 2.1: Syncing Dependencies.
After a successful mdm update
, the project should be ready to run/build/whatever!
(This manual can't tell you what to expect for a build process after that: every project is different, and mdm doesn't get involved in a project after the dependency management part is done.)