Forget Google Maps: This F Train Map Is BETTER
Find local businesses, view maps and get driving directions in google maps. You should consider uploading these to google maps (you can import kml files) and sharing them publicly. That would be a lot easier for most people to access. I use the underway app to get train arrival times. It visually looks like the official subway map but you can click on each station and see what's due.
Google maps was most helpful in giving me the train's platform number and exit number/direction. Overall, okay to feel lost at your first train station experience in tokyo. It'll only get easier from.
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