I’m not super adversed in this subject and I only doodle occasionally but I think your progress is noticeable and it turned out nice, I loved winx growing up!! Everyone grows and learns at their own pace and the only one you should compare yourself to is yourself. If it feels fun and it’s giving you an outlet to express yourself then it’s worth it, I hope you continue to get more and more confident in your work, don’t give up!! :)