Switzerland is extremely well organised. There will be a tourist centre there with plenty of info about hikes around the area. Everything is marked and signposted and you need not worry about hiking on your own. (It's not the Himalayas).
But if you really want a guide, the tourist office will also have details. They also have this helpful site:
https://wengen.swiss/en/summer/
When you go, do NOT miss out on the amazing train trip up to Kleine Scheidegg (and to the top of Jungfrau, if you have the time). You certainly won't be hiking alone, and the views are truly spectacular.
Enjoy!
Kind regards
Ian
The paths are well made, you are always walking on a hard surface, it is not an epic mountain climb.
Even better are the trips you can make on the lake ships.
Km on the other side of the lake from Wengen.