You don't need an FC to do the raids if you want to see the story. The raids on normal are pretty easy. Just do the questline and then when you get to the part where you have to do the raid, just queue for it in duty finder (ofcourse queue times will vary depending on what day and time you queue and what role you are queued as. Don't bother reading guides beforehand because really these raids are super easy and the party will succeeded even if you die over and over and you'll just needlessly spoil yourself and stuff that happens during the fight). If you want to do the raids on harder difficulties, than honestly it's pretty late in the game to join an FC. Extreme trials are puggable. The savage raids aren't that hard anymore because raiders are geared, and FCs have pretty much stopped actively progging them.