Another way to be a good role model is to clean the house so you don’t become lazy for the rest of your life. Also you should do the dishes. So that your siblings do the dishes for you and you could just sit down watch TV or play game all day.
The last way to be a good role model to respect your little ones and your elders, for example clearing the table, making the bed and looking after them. You could also help them with their garden.
That is all of my ideas.