My personal advice is to start with a half gram dose, the same way I'd start somebody off with Albino Penis Envy (or equivalently heay fungi). Remember that there's a 3-4 day tolerance, so every 4 days you could, in theory, work your way up in half gram intervals to find the sweet spot.
I usually advise people acquire psilocybin containing fungi in as large of an amount as possible, then homogenize it to try to get a feel for that batch subjectively. When I was cultivating, I found that super potent varieties could be garbage if grown in poor conditions, but cubes grown in perfect conditions could hold their own.
My apologies if this response is typed strangely, accidentally did an enormous amount of 3-HO-PCP earlier suspecting the line was noopept