I suggest you look at the web-site:
MTA | Subway, Bus, Long Island Rail Road, Metro-North
It can show you maps, specific train lines, how to get to and from certain places. Its a great resource!
Here's a useful tip. Just because your on the same train line as a specific neighborhood doesn't mean your anywhere close to that neighborhood. For example I live on the D line which is the same line as Coney Island in BK. BUT i'm miles and miles and miles away in the Bronx.
Study the maps!
Lastly...Willie? Willie? Umm Really? Really? It's Called Williamsburg!!!