Jenni Turvey

Hi there, I am a hobby photographer with an Fuji X-S10 camera who does a lot of landscape pics, sunrises and sunsets with a standard 15-45mm lens. It does give me some really good results however I am keen to get great results. I live in Australia. I am interested also in beginning portrait photography (never done this before so very much a novice). Is there one lens that would suit both of these purposes for me?