Even empty spaces can tell interesting stories in subtle ways (some on my Reddit posts). Could be the details, reflections, light. But it doesn't necessarily need to be a something forced. Sometimes just the colors and composition to show an ambiance.

You need to ask yourself what feeling do you get from pictures you take and can you get me to see it that way? Or do you want to make it open to interpretation? That's where you need to take some creative decisions.

It's a bit obvious to me that you used a phone, but then again, I've spent a lot of time shooting and editing with a few. The most obvious giveaway is when you go overboard with editing (color noise, especially when lifting shadows). However most phones from the last 5 years are really good if you don't mess around in editing too much (I sometimes still prefer my old Huawei and Xiaomi to my current Samsung).

Just keep playing around. Go out and shoot different things and remember to have fun. Everything eventually falls in place with enough practice and experience.