Summarize the following:
You may want to comment to show your appreciation, or ask questions. The autistic community is an autistic place, but friendly visitors are always welcome.   It is okay to share articles or retweet/reblog things you found in the #actuallyautistic tag. (You may wish to mention that you aren't autistic, though, so people don't get confused.) It's okay to say that an article helped you, or that you agree. It's okay to ask questions. However, autistic people are not search engines, so they are not obligated to provide an answer. Remember, there are plenty of allies who participate in discussions and write autism-related posts! While plenty of autistic people are happy to help, some questions ("Do autistic people have bellybuttons too?") seem a little obvious or demeaning. If you have a question, search the internet for a few minutes first, because the answer might be readily available. Like all subcultures, the autistic community has some unwritten etiquette guidelines. Here some insider tips regarding things to avoid:    Avoid posting in the #ActuallyAutistic tag if you aren't autistic. It was developed specifically for autistic people to discuss things, without non-autistics interrupting. Non-autistics can post in the #autism, #AskingAutistics, and #AskAnAutistic tags.  Respect all autistic people. All autistics, regardless of ability, deserve dignity and respect. Your average autistic person wants respect for everyone, including people who are more capable than they are, and people who need more help than they do.  Don't assume you understand someone else's struggles. Never dismiss someone as being "articulate" or "too high-functioning" to understand what "real autism" is like. You don't know what that person might go through on a daily basis, and they may face serious issues. Furthermore, even if their life is fairly good, that doesn't mean they aren't allowed to have opinions, or that they haven't listened to autistic people who have it worse.  Remember not to take venting personally. Sometimes, autistics may talk about bad experiences they've had, and possibly make generalizations in the heat of the moment. Just like it's rude to say "Not all men!" or "Not all white people!" saying "Not all NTs" or "Not all therapists!" only derails the conversation and makes it about your feelings. If you don't do the bad thing they're talking about, then it's not about you. If you do the thing, then you can use this information to re-evaluate your behavior. Allies are welcome, and autistic people can always use a hand in organizing events, finding resources, or simply educating the community. If you see autistic people organizing something, feel free to ask "Can I help?" or "May I join you?" Some autistic writers have articles written specifically for how you can help your loved ones and be a great ally. Never be afraid to ask for tips!  Feel free to check out other autism articles on wikiHow, like How to Relate to an Autistic Person and How to Understand Autism.

Summary:
Realize that it is okay to join most discussions. Use a search engine for basic questions. Be aware of general etiquette. Don't be afraid to help out! Look for resources written for non-autistic people.