Well, that explains a lot.
Navigating social situations, even online, and getting large projects done as an autistic person can be hard, and in my personal experience, it's important to take careful notes from observations and experiences about what works, what people like or dislike, and what helps you get along with people and get stuff done.
People think you're trolling because you keep asking follow-up questions, which to you are seeking clarification on details that to the other person seem obvious or intuitive. There's not necessarily a lot you can do to not feel anxious about getting every detail right, or to intuitively understand unspoken rules that people think are "just common sense"... but you can try some techniques.
First, write your own notes on paper about the advice you've been given or seen in videos. I find writing it as bulletpoints in a notebook, or even making posters for the walls in my workspace helped a lot. If you can get the advice to sink in more, you won't need to ask the same question over and over.
Second, try googling before asking. There's an awful lot out there if you google "[thing I'm trying to do] tutorial" or "tips".
Third, apologising for misunderstanding or needing clarification, or expressing gratitude for people's patience, time and understanding, goes a really long way. People want to help, but they want to be made to feel like it's appreciated, and even if you don't intend it, it comes off entitled to not seem thankful enough. Before asking a follow-up question, always say something like: "Thanks so much for that. Your expertise is invaluable. Is it okay if I ask for some clarification on..."
