Completly lost after my diagnosis

I am completly lost, I got diagnosed with autism and adhd a month ago (I am 18) but the adhd part seems weird to me. I have the impression that the person who diagnosed me has amplify what I said and write, even if I relate to some point of auDHD. I don't have the impression to be as much struggling than "real" people with adhd. Especially that I don't have hyperfixasion or things like that (I don't know). So I don't know if i really have adhd or not. It's like a big big big imposter syndrome I have the impression to not be legitimate to say that I have adhd because I don’t struggle that much, I am not hyperactive, I can be organised thank to my autism, and I have the impression that other people are sometimes way more innatantive than me. (I am french so I am sorry if there are mistakes)