Hi and welcome

If you you go to the forum list and read the information for new members this will give you all the basic stuff you need to know about what to expect and how to get help.The search engines are a great tool for getting specific questions answered and the wealth of experience from all the people here will fill in any gaps.Your nephew is very young to get such a diagnosis and his youth and strength should help him get through the next few months which will be undoubtedly hard on him and probaly even worse for his family to watch.