So you already know the basics of fish keeping, so there is no need to go over that. If your basic fishkeeping skills are up to scratch it shouldn't be a too great a challenge. But as always, do remember not to overstock! better to have a canister over spec'd for your tank size than under. Don't over feed etc etc
You don't need to keep the water warm like you do for cichlids and other tropicals. Cold water out of the tap is fine, well treated with 'Prime' or something of that ilk of course. You don't have to worry about your water being brackish or too hard (Sydney tap water is fine for them)
Load you tank up with a decent amount of aquarium/pool salt (don't use table salt, it can have various anti-caking agents in it) Guessing it would be about 1 tablespoon/4-5litres from memory. Now let your tank run in for a few days.
Now, try and collect your poddies from as far up stream as you possibly can. They will survive much longer if you collect them from as fresh (least salty) area as you can find.
Don't dump them straight into you tank, they need to adjust to and differences in temp and osmotic pressure slowly, just like aquarium fish from the store.
When you put a hook in them and dump them in salt water its not so much if a problem as your not expecting them to survive for weeks or months.
If any die, get them out of your tank immediately as they will SIGNIFICANTLY reduce the survivability of the other fish within hours.
Having a dedicated salt water tank set-up for live bait I would consider to be a very expense and pointless exercise.
Last of all, DON'T GIVE THEM NAMES!
Good luck, and if you have any problems post what they are.
Cheers!