Is Marine Fireman's Union a good union?

Hello gentleman, I’ve been attempting to find an entry level position in the maritime business in southern California. I discovered the Marine Fireman’s union and they have a hiring hall that will accept people looking to obtain entry level positions. As long as they have their standard paperwork(twic, mmc, passport) along with their stcw-95. Would joining this union be a good start for someone with no actual sea faring experience who is just trying to get a foot in the door?

Thank you in advance for any help concerning this matter.