Where did you feel your kicks? Are these kicks or twitches?

Hi everyone, I’m 18+4 with my first baby (a boy💞) and I’m still trying to figure out if my uterus is twitching or if the baby is kicking. It’s always on the same spot, the left of my uterus between my belly button and pelvis. Did you always feel the kicks in one spot at first or were they all over? Or did you not have kicks for a while and had flutters instead? They’re hard to catch but I can feel them on the outside when they happen. Do you think they’re muscle twitches or baby kicking? Thank you! Pic of me at my gender reveal for fun :)