Frankly at this point self-diagnosis shouldn’t be as demonized as it is. Because getting a diagnosis is, 1. Expensive, 2. Involved as all hell sometimes, 3. Not all professionals being great, and 4. In certain countries cough the US cough, it gets you literally put on a list

I say this as someone who is diagnosed. Just preface any statements you make with you not being professionally diagnosed and that you think you might likely have it and such, and you should be fine. Ultimately the point of the diagnosis is to help you. If you feel like the autistic framework is useful to understanding yourself, use it.