"私はより良い人間になり、前向きなロールモデルになろうとしています。"

Simplified Meaning:

If someone says they want to be a better person and a good role model, it means they are working on improving themselves and trying to set a good example for others. For instance, if a big brother wants to be a good role model for his younger sister, he might start doing his homework on time, being kind and respectful, and helping his parents around the house. By doing this, he shows his sister how to behave well and make good choices. It's like how a good teacher not only teaches lessons but also shows students how to be polite and hardworking. Anyone can apply this idea by looking at their actions and trying to make small changes to be more responsible, caring, and thoughtful so that others might follow their lead. Being a good role model isn't about being perfect; it's about striving to do better and inspire others to improve as well. Every positive change, no matter how small, can have a big impact on the people around you.