I am not because I live in a pretty conservative area. So I try to get some leftist points through to coworkers without opening myself up to the ridicule of just being a “commy degenerate” in their eyes. So I think I can get through to them better without outting myself as a Marxist.
That is really advice for interpersonal relationships in the context of a party/organization.
So the first step is still to organize. Advice on how to conduct yourself among comrades isn't really relevant if you aren't comrades yet.