I remember, when I was 14, a man who used to work with my father, who turned out to be quite complicated, said he wanted to come and see my father to talk about something. The man had become a sales rep for Amway.
I also remember, when I was in Year Six, and we had Religious Education (my area was largely Christian and the Catholics went to one section and the Protestants another and the instructors were laypeople) and the teacher of the Catholics came with her materials in an Amway box.
One area where I could imagine it would be difficult is that autistic people are renowned for honesty and Amway requires a dedication that is on par with Mormon or Jehovah's Witness missionaries, albeit without door-knocking. And you don't approach it as you would a door-knock with, "Hello, I'm Fred/Mary from Amway," you get people in by saying, "I'd like to talk to you about this new venture that I'm involved in." And Amway goes on the philosophy that the more people you can attract to your business the greater a kickback you receive. So, it's a technique of a knife clad in foam.
Also, they tell the story of a forklift operator who makes $6000 a month. So, translated, you then ask, "Why is the forklift operator still working? Surely $6,000 a month (i.e. $72,000 a year) should mean that's all they need to do!"
To work in sales, you need to be an extrovert, as you're dealing with people. And not everyone who you meet there is your friend.
Thinking of the religious education teacher, I am reminded of people who say, "Oh, I was earning $300,000 a year in business, when I found God." Many such people do not drive a 20 year old car that they can only just afford to service and have a church that has dry rot. They drive luxury cars and go on the prosperity doctrine.