Would a vodka extract made with 30 grams of a bridegsii/San Pedro powder be a good first dose?

I know there’s no way of knowing exactly what dose you have unless you CEILO it, but would 30 grams be a decent mild-moderate dose?

I haven’t tried cacti, but I’m looking for something similar to maybe 100ug or 2 grams of shrooms.

I just plan on making a vodka extract, evaporating it and eating the tar.