I'm not sure, it could be possible.
I'm a FTM too and I would always think I could feel LO kicking from the outside (around 21 weeks or so) so I would call my DH in and tell him to put his hand there. Every time I'd feel a kick I'd ask him if he felt it an he didn't. I know I was imagining feeling them on the outside because he couldn't feel them and I thought I could.
Everyone's different so it could be possible. My Dr. told me I had strong ab muscles (made my day!) but it didn't really affect her finding my uterus or feeling LO kick at our appointment.
My husband finally felt our son kicking from the outside last Sunday. I was 23 weeks. Now he can feel him a lot more when he puts his hands on my tummy.
Being 19 weeks you will probably feel your LO for sure from the outside pretty soon!