How/should I compliment her?

Hi, I am in a somehow funny situation. In Bumble I have seen a profile of a woman which I like very much. We have the same taste in music, same kind of views (at least on what I can tell), she is also autistic and disabled but works in a job and does the same kind of sports I do. And last but not least - we are in the same nice Facebook cooking group and have at least liked some of our comments and wrote directly 2-3 comments within us.

Now my questions.

  1. Have you any Idea how I write her a good compliment? I do not want to blow this chance. We have not matched, I have only seen her on the app as a suggestion.

  2. What do I do when she does not swipe back? Is it okay to contact her on Facebook or this is the kind of stuff only creepy stalkers do? I do not want to make her feel uncomfortable. Maybe I will see her in real live in some other context and if she does not see me as a potential love interest I would hope to make at least a friend out of her.

  3. When I see her in real life, or we exchange for other reasons messages on FB - should I directly say to her, that I have seen her on Bumble? Or could she be ashamed about that, especially when she maybe had said no to me?

I must say, I think she is much more attractive than me. So, I do not think that are my chances are very high, but maybe........if I do it just right.............. :)

PS: English is my second language, please excuse me if I write somehow strange.