Ghost Rider is in the first arc of season 4. Season 4 is probably the best of the series to date, they split it up into three distinct arcs and it was all well paved (the LMD arc was a bit of a dip from Ghost Rider, but the Agents of Hydra arc after was 10/10). Season 5 had two arcs and it became obvious that there was a severe budget cut (only like 2-3 episodes had outdoor scenes), but it had a lot of good moments. Season 6 has been great so far on a level similar to season 4.The
I honestly can't remember much about season 3 beyond lore BS about Hydra, "SquidWard", and that one bottle episode that was actually good, so I'd almost recommend just restarting with season 4 and piece what you missed before that from context clues.