If I wanted to start at the begining with the core set and then slowly work in the expansions as they came out till I catch up is it possible to do it and not have missed anything. Were there any special events or leagues that I missed. An example would be the Warhammer league that had a kit that stores got. Also I notice on the events for the LCG game day event there was an epic quest event. Is there a way we can run that locally?

I've been playing since the beginning and I don't believe that there have been any cards released at special events that weren't made available afterwards at some point.