Well, the first step is stop looking to anyone or any community that uses terms like "telepathicmaxxing." If you want to increase your brain power, don't look to people who celebrate brain rot.

The best step would either to be find someone who knows this skill and learn from them. Otherwise, you will probably need to look to older books written outside the norm. Like this book from William Walker Atkinson, for example-

https://archive.org/details/practicalmindrea00atkirich/page/n5/mode/2up

JOHN BARKHAUSEN:
That's fascinating. Is that possibly where we're evolving to—telepathy? You mentioned a talk by Michael Persinger called "No More Secrets."

DR. RAYMOND PEAT:
Yes, he makes some good arguments. He experimented with stimulating the brain to get what he called the "God consciousness." I think that sense of overwhelming meaning is just a natural brain process when it's properly energized. When you think of an atom, you can't think of an abstract atom out of time; every atom has its own history.

— My opinion —

I think that maximising your thyroid function and bioenergetic levels to the heights previously undreamed of (methynele blue, high quality sugar from always fresh fruits/juices, 250w hallogen indirect lighting, purified/optimally dried air, filtered water, aspirin, high doses of mk4, permanent slight gelatine and calcium domination and many other substances/technologies which were not available to our ancestors) is something which may potentionally unlock levels of perception and cognitive function not possible before.