This isn't aimed at an amateur, or an unskilled person looking to do something constructive for a few hours a week.
This is for a professional, who wants to do a certain amount of their work unpaid, for charity
This will most likely be someone working part time near retirement, or even post retirement
Or possibly someone already working in this field, but wanting to build up their portfolio
Yes, there will be takers, but doesn't sound like a good match for you, OP - but don't worry, there will be other voluntary opportunities