If you have 6ppm Ammonia, it will take 60ppm FC to clear, you don't just add it at one time.. In an 11K gallon pool that would be about 6-7 gallons. If your ammonia is higher, it will take more.
Best thing to do is go get 20 gallons or so. You can always take it back, but you will likely need it if you end up having to slam. Get enough CYA/Stabilizer to get your CYA back to 30 after you clear the Ammonia (have it on hand for when you get to the end of the ammonia process).
Find a period of time 4-8 hours where you can check pool every 30 minutes. Follow the ammonia process...every 1/2 hour. Don't need to understand much more than that...
We got your back. You can do this. If you want inspiration:
How Clear is TFP Clear? Let's See (Pics Please).