Their early albums are trash and the only good things out of them are Long Season and their live album.
Their live album has all of their legit GREAT tracks and are rendered the best versions of those tracks, plus Long Season is as epic live as it is in Studio form.
The best way to get into them is tpo listen to their whole discography, you're probably not going to get into their early stuff but it will ALL be worth it by the time you hear the live album. Trust me.
And by then, if you still manage to not like Fishmans, then I'm sorry.
But that's unlikely because even I thought they were pretty trash going into them.