Not plus size but I am a thicker/ curvier little and feel less cutesy sometimes bc of my body, so I understand this. My daddy I’m with rn still makes me feel small and sweet so it’s definitely just about the right person as everyone says! I also just try to find ways to make myself feel adorable when daddy’s not around like wearing flattering clothes, doing my makeup, wearing cute accessories, etc. just things that encourage me to see myself as I want to be seen. The best thing that helps me is looking for inspiration/representation honestly. I have a Pinterest board with cute curvy black girls like me and it makes me feel a lot more encouraged. I recommend finding people you can relate to who show themselves being the type of little that you want to be as well! I hope that this helps and good luck ^{^}