My only experience of volunteering at a sporting event was being encouraged by a friend to marshall at a national cross country running meet in Buckinghamshire. My job was to stand at a corner for four hours, propped against a tree in the drizzle, holding a big arrow pointing to the right. A job that took a morning as each group, segregated by gender and age splashed by in the mud. A job that could have been done by four cable ties. My reward - a mars bar and the dog end sandwiches left over by the runners after their buffet.
Regarding the golf. It's like cricket or tennis, I'll start watching it towards the end if it looks interesting.