I've felt baby for a while now, but I'm on baby #7, so I'm pretty familiar with what to look for, plus I'm technically due at the end of October, so I'm 22 weeks. Dh has even felt baby kick from the outside! That's super exciting!
I feel like laying flat on my back and feeling where exactly my uterus was really helped me to concentrate on feeling where I was imagining kicks and being able to confirm if they could take place there or not!