I'm older, so my answer is based on many years of deciding what to do.
When we moved into our house over 18 years ago, the living room had god-awful peach wallpaper. I was not, at that time, in a financial position to re-do it. I purchased furniture to go with that color scheme. But hated it for many years.
My favorite colors tend to be the types found in seascapes: blues, aquas, greens. I used to buy clothes in aqua all the time. So my fashion "loves" sort of dictated the direction I'd move next.
I also, if given the financial means, would live near the ocean. I love the idea of a beach house.
That directed me toward having a shabby/chic "beach escape" living room. I have beachy/ocean type accents in a small way, but the colors of everything are neutral (white walls, white IKEA sofa) with accents in the colors I love.
Look at the big pieces first. If you are still uncertain, then think about getting something neutral, like white, cream, or tan, then accent with colors you love. The style will follow as you fill in. You can go to furniture stores and see what you are drawn to. You don't have to buy, simply sit it in, look around, see what makes you feel comfortable. It's different than websites, it's what you are surrounded by.
Your style & taste will change as you get older. You'll figure it out.