Communication100
Separating out self-concept and self-image is challenging. Most of the time the two concepts are viewed as interchangeable. IF this is for a school project, make sure you understand the teachers' expectations and follow those, but in the world at large, the differences between self-concept and self-image are usually not seen as vital, some would even say not valid.

self concept (or my beliefs about me): I am an intelligent person (as shown by my school grades); I am a happy person (as shown by how much I smile); I am good with money (as shown by my savings account and credit rating); I am valuable

self-image (or what I "see" in myself or imagine others see in me): I can believe (self-concept) that I am an attractive human being and also know (self-image) that I have ugly hands. I can understand I am good with money (self-concept) and also accept that I am a tight-wad (self-image). Self-image has a tendency to be judgmental.

Self-esteem is easier to distinguish from self-concept and self-image in that self-esteem is how we feel about our self-concepts and self-images. You can have high, medium, and low self-esteems. For example, you can feel very good about the competition you just won (high esteem) and yet feel poorly (low esteem) about the speech you gave accepting it. Generally, in the areas you feel confident about your esteem will run high and in the areas you feel anxious about your esteem will tend to run low. Self-esteem, as with self-concept and self-image, is greatly influenced by others opinions.