a) are there any content warnings for the zine and b) is there sexual content in it? (i know it's listed as 18+ but want to double check)

A very good question, and one I meant to answer before posting! The zine is officially listed as a Choose Not to Warn space, meaning that we’re not currently planning to print a list of official trigger warnings but you can assume that it does contain some things that would fall under the AO3 standard warnings categories.

I can say that it does include some sexual content in the prose, and there is some body horror but no explicit sexual content in the visual art.