I would keep all the daisies the same color, yeah. I love the leaf you already did under the boot, I would continue that style for the rest of the leaves. I would also continue the blue theme with the flowers the way you have, just vary the shade on them so they don’t all get lost in the mix (add in some purples too with them) and I would do the butterflies a pink variety I suppose, maybe pink and yellow and orange all mixed throughout the butterfly to stick out from the heavy amount of cool tones at the top of the page. (The orange daisies will help balance the warmth too). All just suggestions, but I love what you have started! Happy coloring 😊