For the Rhodes 19, which I've sailed on but didn't fly the chute, you are probably going to launch from the cockpit, not the foredeck. (What ever you do, do not send your significant other up on the foredeck to rig up the spinnaker.) This means that the spinnaker will go up under the boom.
1) You need sheets, of course, and they should be pre-run at the dock or mooring. To launch from the cockpit one sheet, call it the windward, will run from the turning block on the transom, outside of the shroud, around the forestay and back to the cockpit where it can be secured until the launch. The leeward sheet would run from the turning block, outside of the leeward shroud, and back to the cockpit where it can be secured. The tail of the leeward shroud should be pre-set to an average setting gleaned from experience. This setup is to launch the spin forward of the shroud. You can launch it aft of the shroud too, but that is a longer way to haul the sail forward and it is during the trip forward that a lot of mischief can occur.
2) The spinnaker halyard should be secured near deck level on the mast.
3) The spinnaker pole can live on the foredeck. The up and down can be attached if there is enough slack in those control lines to allow it to sit on the deck. The lazy jib sheets run over the pole so that you can tack on the upwind before the spin launch. A bungie chord could attach the pole control lines (And spin halyard) to the mast and take the slack out.
4) You are going to do a bear away set so that you do not have to contend with a last minute tack before the set. It is much easier. All you do at the helm is head off to a deep reach and let out the main. The boat should be pretty flat by now making each step easier. You will have set the spinnaker sheets up for the lee side when you bear away.
5) As you approach the turning point, or even after, Attach the spinnaker sheets to the sail, which has been pre-packed into the sail bag ( For packing you have to run at least two of the sail edges from clew to head to make sure they aren't twisted and secured so they can't twist), or gathered into a laundry basket or whatever contains it. The sheets attach to the sail , windward to windward and leeward to leeward. The halyard is removed from the mast and attached to the head of the sail.
6) Release the pole control lines from the mast and attach the pole to the windward spinnaker sheet. Put the pole up on the mast. You will need slack on the lazy jib sheet. And enough slack on the windward spin sheet to raise the pole. So now you have the pole outward end somewhere near touching the headstay, attached to the windward spinnaker sheet raised and on the mast. The leeward sheet is attached to the sail.
7) Pre-feed the spinnaker windward sheet to near the forestay by pulling the windward sheet back. The pole may want to follow it back so you may have to shove the pole forward a couple of times. When the windward sheet is at or near the pole outer end it is time to launch.
8) Haul the spinnaker halyard up with gusto but stop if there is no progress because something is caught and your day is going downhill.
9) If the spin is going up smoothly, when it approaches the top, haul back on the windward sheet which will pull the pole back too and bring the sail out of the shadow of the main where it will inflate if it hasn't already. The leeward sheet should have been pre attached to a cleat, stop or winch for an average setting so you do not have to contend with it during the launch.
10) The spinnaker should be flying with a curl in the leech (Because the sheet hasn't been trimmed) with the pole approximately square to the wind. Did I mention that the pole down should have been pre-set to not allow the pole to sky? Well, I should have. The up is less important and can be slack. There are so many different set ups for the up and down it's hard to be more specific. On my Bandit 15, the up and down was just one line with knots in it that a jam cleat on the pole caught at approximately the right height. The pole ring did not go up and down.
11) So you should be sailing with the spinnaker up and drawing the jib underneath it in the shadow of the main. Release the jib halyard and drop it. If you sheet in tightly you can probably reach forward and haul it down enough. You do all this while sailing the boat with the tiller between your legs. Easy.
12) Want to talk about the take down?
This has been fun to write since it going through it by memory was almost like doing it out on the water. Apologies for details I may have got wrong, or were incomplete, and descriptions which may be unclear or not recognize the OP's experience level. It was a good mental review for me.