An Innie would never consider a regular apartment "boring"

One of the larger pieces of evidence that it's Helena we see in S2E1 (IMO) is that she characterizes waking up in a "really fucking boring apartment." To an Innie, even the most mundane things about the outside world would be brand new, confusing, and exciting. This concept is emphasized in the episode through Gwendolyn Y asking iMark what the sky is like and what wind feels like - all things an Outie wouldn't even think to remark upon, but to an Innie it is thrilling.

Even if Helly were lying because she was embarrassed about being an Eagen or worried about the other refiners judging her, I have a hard time believing that an Innie would characterize anything about the Outie world as mundane or barely worth remarking upon. Recall that Irving woke up in what was ostensibly a "boring apartment" and it was both overhwelming and disorienting for him because, as he mentions, "It's not our world up there."

I think the writers don't want to tip their hand too early and so we're meant to be curious about whether it is Helly or Helena at this stage. I would bet we're going to find out in the next episode or two.