Everyone (nearly) on here is going to be super positive and say go for it but surely you want good advice based on the facts. What do you mean by go once a week in my current job? Is that still working at McDs? What kind of work is it, will you be dealing with these families directly yourself, is it just doing admin and if so are you sure they as not going to make you feel inadequate because of lack of Excel skills or something like happened before and knocked your confidence? Who is this adviser?
These are all questions you need to think about and if you are happy with the answers then yes this may be the opportunity you've been looking for.