Brent, if you take a boat ride on lake brienz, you can also see the Ballenberg museum that same day. You’d take the train from wengen to brienz and from there take a bus to the museum. Then, bus back to brienz where you can catch the boat to Hotel Geissbach or Interlaken. Check the times on the SBB app ahead of time so you can time everything out ahead of time so you don’t have to wait too long for the boat. Although, brienz is a nice place to walk around for a bit if you do end up waiting.
Like swiss life mentions, if you have nice weather you might want to spend that in the mountains. Ballenberg is in a big forest. It’s nice, but for a first trip to Switzerland, I would skip it, depending on the weather.
If you do go to the museum, check the opening times for the buildings. I got to the museum when it opened at 9, but most buildings didn’t open until 10 or later. I wanted an early start as I did the brienz boat ride after.
https://ballenberg.ch/en/activity/
Everything is timed well in Switzerland, but it does help to plan ahead and know what your options are. I think your biggest challenge will be timing the boats, as they don’t run as often in the offseason. There might be a 2-hour gap between some boats.