Dont feel worthless! Your doing something to save them and that's awesome!
You'll want to have an airstone at a minimum to increase oxygen levels in the QT. Keep water available for water changes, because ammonia is a concern in a newly set up QT. You can use a small HOB filter with a sponge. Get a bacteria in a bottle product and soak the sponge with the bacteria for an hour before use. This will help, but water changes will probably still be needed. an ammonia alert badge is helpful for real time ammonia readings in the presence of meds. Some meds will render your regular test kit unusable.
Here's how to treat for flukes. I'm pretty sure they reside on the fish itself and not on the rocks or sand in the tank. That being said, a fallow period wouldn't be a bad idea if you suspect any other parasites like ich are present in the tank. Also, the flukes spread from one fish to another somehow, so I'm sure the leave the fish to find another after hatching from the eggs.
Flukes:
Symptoms - Flukes are parasitic flatworms which harbor mainly inside the gills. Physical evidence of flukes is usually not visible; however at least one genus likes to target the face & eyes, so you may notice visible symptoms in those areas. Behavioral symptoms such as yawning, head twitching, scratching (targeting the gill area) and lethargy are much more common. As the disease progresses, the worms move to the eyes, and this is when you may see visible symptoms (cloudy eyes). However, you can confirm the presence of flukes at any time by performing a freshwater dip. At around the 3-4 minute mark, you will see tiny white worms fall out of a fish (especially out of the gills) if a fish has flukes. The worms will settle to the bottom, so you can use a flashlight to look for them there as well. A dark/black bucket is preferred for the freshwater dip, as that makes the white flukes easier to see.
Treatment options - Prazipro. Performing a freshwater dip will provide temporary relief, but two rounds of Prazipro (5-7 days apart) is usually required to eradicate flukes. Formalin may be used as an alternative treatment.
