First of all, your cat should stay in its cage. Instead use words like "I" or "Me". There's no need to SWIM or use other nicknames here!
Now, onto the many, many problems of what you did.
In my experience, it's better to simmer rather than boil when acidifying. Your ratio there looks a little off. I use 1.5 cups white vinegar to 10 cups water. You might wanna try using slightly more vinegar. My calculations say that 270ml white vinegar to 1800ml water. But since the acid step is mostly optional, this is the least of your problems.
NEVER add naphtha before basifying! You should basify first, then add naphtha. With such a large extraction, you might want to use more lye (be careful when using lye!) You really cannot over basify. It's better to use too much lye than too little. Considering I use around 60g of lye for a 250g extraction, you certainly need more lye for a 500g extraction.
You should wait until the naphtha layer has fully separated, then wait even longer! The naphtha layer should be completely free from the black sludgy layer.
Don't feel too bad. My first extraction went pretty rough as well.
I'll pull an Earthwalker and recommend this popular tek...
https://wiki.dmt-nexus.m...7_Tek#Step-by-Step_GuideFollow those instructions exactly, and you should be good to go.
POADS is gone!