I have more Torchbearer experience than most. Happy to assist, clarify, or confuse as needed. 😉

If you’re going to use a pre-made dungeon of some sort and are still on the fence, Skogenby’s a good option, but I’d go with Inn of the Three Squires first. It has more of the spelunking stuff that is classic Torchbearer.

I mentioned in the other thread that you might consider adapting an old D&D module, too. The ideal fit for the type of game you’re considering is Keep on the Borderlands. If that old gem’s unfamiliar to your group, I think you could get a lot of mileage out of it. You might need to do a little custom monster creation, but you get the benefit of its tried-and-true structure and challenges.