I haven't gotten to the vulture yet as I'm going sort-of-alphabetically, so I can't really link to anything yet. Please don't feel bad. J.K. Rowling is very well-versed in mythology and the like, and everything always means SOMEthing, even if it's not always what you initially think. People associate black cats with evil and misfortune, but anyone who has ever had a black cat knows that such ideas are false impressions. The patronus shows what we can be when we are at our best and most true to our own natures and base personality traits.
Vultures are fearless. Having your patronus take the form of a vulture means that you have the strength in you to be yourself, flaws and all, should you come to accept yourself inside and out. Sometimes it's hard facing the world, or even your own internal struggles and you may be tempted to reject it, but you have the power to face it and come out on top. This is not a strength everyone has... to be honest with oneself.
Would I be wrong in saying you are a patient and tolerant person? That's a very common trait in a vulture. Naturally, I don't just mean in the sense that you don't mind waiting for a new episode of something you like, which may make anyone a bit fidgety, haha. You're likely an accepting person, and are willing to go with the situational flow and accept another for what they are, where others may not. Are you also called upon, or perhaps even take it upon yourself, to clean up others' messes? No matter how bad they are? A vulture is dutiful, getting things done even if they don't always like it. Do you also like to analyze things? Vultures are quite intelligent and often like looking at stuff from perspectives no one has thought to try before. There's a reason the bird isn't a common animal to get, as most people don't quite fit enough for their patronus to grow these great wings and soar.
There are many kinds of vulture/condor, and some are very beautiful. The test doesn't specify what kind you are, as there is always room for interpretation. (One of my favorites is the Egyptian vulture; shame it's endangered.) They are very beautiful to watch in flight, and they seem to do it so effortlessly. Very majestic birds, like feathery dragons, and condors can be bigger than timber wolves. Vultures provide a necessary service, and they're often used as a symbol of old ends, new beginnings, and renewal in general. That they can survive in so many places also has people associating them with resourcefulness and adaptability. Some can even use simple tools, which is a behavior not seen in too many animals.
(In order: bearded vulture, palm-nut vulture, Egyptian vulture, king vulture, Rüppell's vulture.)
The thing about the Patronus is that they tend to be like a... reverse Boggart, I suppose? It's not saying "you are this animal, now you have to eat grubs like the mole you are". A Patronus takes the best aspects of yourself, things important to you, and then takes a form based on whatever they happen to be. Someone friendly and loyal may get a dog, someone determined and hard-working may get a salmon. The differences there... are that there's a crazy amount of "thing combinations" a person can be. An industrious person that cares for themselves and their family may get something like a beaver, but if that same industrious person prioritizes caring about the greater good and always puts others above themselves instead, they may get an ant. The animal form just shows off what is most true about yourself and what animal exhibits that combination just right in nature. As a vulture, you are a survivor. You are intelligent, adaptable, accepting, and not afraid to be who you are, either.
And I think that's pretty cool.