You'll absoluely love it. The boats are spartan, but between the galley, your bunk, the dive deck, and the "aluminum beach" up above, there's always a way to get some space. The boat's spartan, but who cares?? We do this to dive, not to lounge around in a 4-star hotel. It's fun, it's "dive, eat, sleep", then repeat...
Everyone uses the deck shower after every dive. We're the cleanest people in the world.
And the diving?? I did it as a newbie when I stepped off the gate (and yes, it's a bit of a plunge, but look straight out and wait for the splash and you'll be fine), it was only my 5th dive since getting my card. The current was minimal, water clear as gin, my buddies had a little more experience than me (of course), and it was just great...they don't call it the "Texas Caribbean" for nothing. East and West Flower are coral and fish, Stetson is sedimentary rock pushed up by the salt dome forces into vertical ridges, like a Stegasoarus' back. A night dive on Stetson (my first ever night dive) is like landing on the moon. Way cool. So's a rig dive, if you have time to get one in.
Good crew, good briefings, good camarderie, and great diving. No air fare for us semi-locals (7-hour drive for me). Best value around. Only downside is the weather, since it's 90 miles offshore it's subject to blowouts, but they'll usually go or cancel in time to keep you from getting on the plane/into the car
You'll love it, and when you're done with that 2 or 3-day trip, you won't be a rookie any more.
Have fun and good diving.