Pisces on the inside, Cancer on the way in.
Your sun in Pisces (water, mutable) is the engine — what feels at the centre, what adapts when you are at home in yourself. Your Cancer rising (water, cardinal, ruled by Moon) is the door — the way you arrive in a room, the first read the world takes of you, the body you walk in.
Strangers tend to assume you are sensitive and tidal — that is the Cancer arriving first. Then they get to know you and discover the Pisces water underneath, which can be reinforcing — same flavour, more of it.
Reads as Cancer until you trust them; then Pisces comes through. The mutable-cardinal mix means you adapts on the inside while starts on the outside — internal and external rhythms are different, which is its own work.