For me I just kind of ignore the fact that I am neurodivergent, it really doesn't matter. I always refused in school to get any help for it since it really bothered me that I should be treated different. I haven't even gotten diagnosed since I wouldn't take any medications anyway.. But to answer your question it's extremely obvious if you are neurodivergent, it's not really a question that you have to ask yourself. If you need to research or seek answers you are probably pretty normal, there's things you notice in your day to day life that people around you do not have and over the course of your childhood you will have a pretty good understanding of it.

Obviously, this is a sample of 1 so take it with a grain of salt. I am just naturally stubborn which helped me learn to deal with these problems on my own.