Knocking down internal walls
Sound like it is a small wall. Many thinks to look out for though. The first will be make sure it is NOT a support wall. This is a little hard for me to explain in writing without righting a chapter. Most likely from what you described is s not. This is not something you want to guess on though so you should get someone with construction knowledge to at least check this part for you. Next their may be pipes or electric in the wall. If you a determined not to have the wall. the wall board can first be removed (with your hammer) carfully so if their is pluming wiring or anything else in their you can find out and can then attack (not with your hammer) each as required finally the framing would be removed with the sill and header plates. If it is a support wall disregard this info and have someone knowledgeable address this first for you.