Welcome to the club.
You can "be in your head" if you have to "think" your way through life and basic things like "appropriate" communication and social skills do not come naturally to you,...you tend to observe and mimic,...or read and watch videos on communication skills,...it's not intuitive like it is for neurotypicals. Yes,...that processing delay,...is enough for neurotypicals to sense that "something is off" with you.
You speak like I do with regards to breaking things down to "first principles", mentally "reverse engineering", and looking at things at least at the simplest pathways,...sometimes down to the atomic level and understanding the strengths of various types of bonds, how they interact, which lends itself to understanding the nature of Newtonian physics. It's how I process and understand my world,...it's not enough to have a "basic understanding" of anything,...and I tend to take very "deep dives" into any topic that stimulates my interest.
I like your screen name PHOton,...one of my screen names on another site is "photon user",...light particles,...I have solar panels, battery storage, and two electric cars. Pretty much that fusion reactor in the sky gives me nearly all my energy needs for the house and two cars,...my bills are mostly either $0, or less than $50/month.
Controlling your emotions and anxiety levels are part of the autism experience,...and it is important because as these two increase, your ability to think clearly and communicate effectively diminishes,...an inverse relationship.