I wish I was diagnosed younger

Not just because I would be better behaviourally now but because I feel kinda invalid being diagnosed at 15, I was the one who wanted to get tested and I was then diagnosed but I feel like my autism is less then/ not as serious/ and invalid because of my late diagnosis, when I was 11 I was diagnosed with a learning disability, adhd and anxiety but not autism until I was 15 and I just wish I was diagnosed younger..