It's interesting that you say you are newly diagnosed - how recently and how old are you?
I was DX'ed at the age of 33 and I'm now 42. I can tell you, from previous experience, that you will go through a period of questioning who and what you are (for me, it lasted about two years).
I don't have the professional background to be able to tell you why this is a thing, but I suspect it is common in adults who receive a diagnosis of ND in later life. Many of us pursue a diagnosis because we question ourselves anyway and it can be a bit mind-blowing to find that a DX doesn't answer all those questions (in many instances, it raises more!).
If asked, I would say that a DX is not a 'final answer': it is a roadmap that allows us to pursue those answers with more insight.
Some of the things you do will be personality traits, unique to you; some will be aspects that are common among autistic people, such as sensory-seeking behaviour; and some will be human things, that we all do to a greater or lesser extent.
I take a 'person-centric' approach to my autism - I am an autistic person, in the same way that I am a grey-eyed, two-legged person. My neurodivergence is part of me, but it is not me per se.
I know it is very tempting at this stage to say 'I do X because of Y', but I'm afraid it really isn't that simple.
Be kind to yourself, value yourself - including your quirks and talents - but don't feel that everything has to be labelled. As others on here say, labels are for jam!
Best of luck in your journey. 