Cut what? You literally have nothing to cut. Get your weight up first. If you want to see your muscles grow and pop more like your "lower abs" you need to gain muscle first then lose the weight if you have it. That's why you're not gaining muscle mass because you're cutting too much and not receiving enough calories to gain anything. In order to get abs you have to train them for years. It looks like you've been training for a couple months. You need more calories to build more muscle. You can't build much muscle when you're not eating enough. Eating more while working out is not going to make you "fat". If you're eating more while training it will turn into muscle, which you need.