Just sliding in here to say that AoS is a mixed bag of occasionally questionable quality, but the Ghost Rider stuff was some of the best of the entire series. It's probably pretty significantly different from the comics but I'd still recommend giving it a try since the Ghost Rider Hulu spinoff sadly never happened. Just... watch a youtube recap of seasons 1-3 and jump into s4 when Robbie shows up.

(To clarify, not saying this for RP purposes, I simply don't want anyone to be deprived of that amazing story arc just because the early seasons were Rough.)