Is this normal for 17w4d?

Im 17w4d and keep seeing people post videos of seeing their babies kick from the outside around this time. Even first time mamas. This is my second baby. I still can’t see her kick from the outside. I can feel her move especially when I’m standing up and laying on my back, but it’s sporadic still. Not constant.

I always have my hand on my belly to see if I can feel her from outside yet but I still can’t. And I can’t see any movement from the outside either. I’m not too overweight but slightly. I had a flat stomach before pregnancy but some leftover mommy flab. Idk if that has something to do with it?

I’m sorry if this is a dumb question. I had my son at 16 nine years ago so this is like starting all over for me as an adult. This is also my rainbow baby and I am so nervous all the time something may be wrong.

Also is it normal that the movement I feel is very sporadic and not constant?