Furong Town is indeed unique; the ancient town perched on the waterfall lives up to its name—it's very beautiful, especially at night. The off-season is less crowded, which is great, but it involves some ups and downs, so it might be inconvenient for people with mobility issues.
There's a distance from the high-speed rail station to the scenic area. There are free shuttle buses during peak season, but not in the off-season. If possible, take a taxi; they're not expensive. Taxis generally charge a flat rate of 20 yuan per trip (no meter). Ride-hailing services are usually hard to find. If you want to take public transportation, you first need to go to Furong Town Bus Station (3 yuan, not a regular bus, but a privately owned minibus), then take a blue minibus to the scenic area (2 yuan, the minibus is old, but considered a legitimate local vehicle).
There are many restaurants offering views of the waterfall at night, all located on the stone-paved street. In the off-season, you can browse and decide which restaurant to choose, even if you don't intend to eat. The food and prices are generally similar across restaurants, so just choose what you like. In peak season, you'll need to book in advance.