Boy not happy to get married to a girl his mother chose

Q: My mother has selected a bride for my elder brother. He is not happy with the skin color of the bride however the girl comes from a good family and has good character. But my elder brother is not happy as all his friends have beautiful wives. Please provide an explanation so that me, my mother and family can convince my brother. Is there any salah or ayah to offer and fill my brothers life with piece and love?

Assisting a non-mahram woman

Q: Is a brother (caller of Islam) obliged to continue helping a sister with disabilities if she has no one? She learns the deen through him instead of others. If the brother is choosing to not help her, will he be responsible before her in the Hereafter? He is choosing to not help her, because he cannot deal with her.

Fear of shirk

Q: I have extreme fear of lizards. By the grace of Allah Ta'ala I am trying to overcome this by ignoring its presence. Is this fear a shirk and will I be forgiven?