How do I speak to people on HF?

Hi there, I got a xiegu g90 for Christmas alongside a JPC-12 and I was wondering if I'm doing anything wrong? I've been listening for the past week and I've heard mostly morse but I'm only into SSB, whoever can do morse I praise you, it's hard for me to learn. But anyways so far I've answered 2 cq calls, both from Italy and both told me I had a bad signal (55 and 45) and both just abruptly said "Goodbye" to me. I was just wondering, are the contesting? Or why would they just abruptly end the conversation there? All they did was ask for callsign, said my signal and then goodbye. Ive looked both people on qrz and both had over 100000 lookups. So am I doing something wrong or is just my signal that puts them off? M7KOV