Insomnia and the resulting poor sleep will always magnify a symptom. You must find help with sleep. Many of us struggle with insomnia.

"I discovered that high levels of stimulation, psychedelics actually help me focus better. "
This is very odd. Most TBI people find that excessive stimulation and mind altering drugs only make things worse. They may mask symptoms.

Stimulating drugs and activities may work for a short period but will usually leave one very depleted the next day or longer.

Question: Is English a foreign language for you or do you have speech difficulties ?

I have a TBI friend who only speaks English but she has a similar grammatically unique style as you.

There are no surgeries (doctor cutting with a knife) that help with TBI struggles but there are therapies that can help.

Different cultures use the term surgery differently so I'm not sure what you mean.