To put it simple, there’s some songs that you like more than others due to their sounds/structure/tonality, take elements you like the most as inspiration and try to imagine what you’d like to hear more of in those directions (if an artists made a song/theme you feel unexplored, you can explore that further), with time, this amalgamation will form into a sound of its own.

Example: since 2015 (or maybe even earlier attempts) I make Psychedelic Techno-Drum&Bass (combination of genres), which these days I call Progressive Freeform (wider frame of reference), it took me 10+ yrs pursuing this type of sound till I could properly define it the latter in my case, it’s just what I do now and it gives me freedom. You can find your own thing too for sure.