I don't know what you exactly want to know, but the train connection from Geneva is quite good.

It is a very touristic place so it shouldn't be hard to find places to stay. Also there are a lot of towns around which offer a lot of things to do, Grindelwald attracts a lot of tourists for example. 

There is a Hooters in Interlaken ;)

Neda,

Thun (nearby) is also nice to see.  There's an old-town area and a castle that's walkable from the train station.

As your profile is not accessible cannot really advise.  Steeam train to top to mountain Brienzerrothorn, Jungfraujoch, lakes, there is a Swiss outdoor museum, lakes sailing  All depends what your interests are.  so best if you call the tourist office 

Thanks all for your helps