"I feel I'm an actress who sings a bit"

Bea Arthur's quote speaks with her self-perception as an actress firstly, with singing being a secondary talent. This recommends that she considers her performing to be her main strength, and that she is positive in her ability to perform on stage. It also implies that she is comfy with her singing ability, however does not consider it to be her main focus. This could be due to the fact that she has actually had more success as an actress, or because she merely prefers acting to singing. It is likewise possible that she is merely being modest and minimizing her singing ability. Regardless, her quote talks to her confidence in her performing capability and her convenience with her singing ability.