This one is not easy.

"Under the skin" suggests you speak of someone outwardly different to your description, nostr:npub1dsdgn279kkzrmuxxq2v686l26k8u97hjkve342zlpqcfsqk4xtpstkl2mp.

Inwardly, emotional, even chaotic (raging as the sea). Tides suggest restlessness; related to blood, restless emotion, ebbing and flowing. Tides are subject to storms, are variable, ultimately destructive of land - the shore where you picture yourself. They may, in this instance, be self destructive. The tall ships, perhaps, the navigating forces of the person's (outwardly) rational, well directed self. Perhaps the flesh is the constraint of land in this imagery - a barrier to self expression in apparent stability. Yet vulnerable to erosion.

It seems you seek to join such an experience. The reference to the old gods is almost Lovecraftian; threatening, dark, unknown - yet exhilarating. Perhaps to be a sacrifice to such is to break personal conventions.

Good luck, but be careful what you wish for!