Your style appears gradually through choices you keep making without realizing they are related.

Style is not chosen at the outset. It accumulates from thousands of small preferences you exercise without noticing, and only becomes visible when someone else points out the pattern or you look back across enough work. That is why trying to design a style directly produces something stiff.

Lay out several finished pieces and look for what repeats. The repetitions you dislike are worth changing. The ones you had not noticed and do not mind are probably the beginning of your voice, and they deserve to be leaned into rather than smoothed away.