Needless to say, those with strong ability, if they lack practical work experience, can highlight their own personality and quality characteristics in self-evaluation, such as being smart, studious, diligent and persistent. Don't directly say that you have these qualities, give some examples to illustrate. For example, you learned XXX through a period of self-study. . . . .
Finally, write one or two attractive slogans, such as: "You can accept failure, but you will never accept giving up" and so on.
I hope the advice can help you.