In my personal opinion, sunshine determines the style of painting: positive, optimistic, and upward, while growth also reminds us of inspiration: new, powerful, and exciting.
So, you can use a teenager as the protagonist to create illustrations. You can use sunflowers and hyacinths, flowers that make us feel sunshine, to embellish the painting. If you already have this painting and want to include it It would be even better if the profound meaning of the painting can be embedded in the painting, so that the viewer can not only enjoy the beautiful scenery, but also gain spiritual comfort.
But more importantly, I hope you can discover your own inspiration, because only by painting according to your own inspiration can the things you paint be real and impress more people.
ps: I hope the above can inspire you! ^_^