But for younger niece and nephews i may be the only good example they have.
There is this tendency today to almost believe that Our Lord does not take care for those of good will. He certainly does, regardless if everyone around us is evil.
You have a noble intention, but your priority is your own soul first. This is the order of charity established by God, that we love Him above all things, then ourselves, and then our neighbour as ourselves.
I am ready to bring forth authoritative quotations to anyone who does not believe this.
Children with the use of reason will already begin to receive the inspirations of God to lead them to Himself. It is up to them to follow these holy inspirations.