Hi Nick:
Today's been a crazy work day, so apologies for what's going to be a quick glossary of terms rather than a real explanation. I very much admire and respect what you are doing as a first time sailor, it took me many years and much smaller dinghies to learn to sail by myself.
JIb: Daysailer uses a jib as teh foresailer, it's smaller than the triangle between deck/forestay/mast and has no overlap on the main.
Genoa: Daysailer does not use a genoa. Genoas (also called Jenny's) are equal to or bigger than the fore triangle and overlap the main.
Tacking - turning so the your bow crosses the direction of directly into the wind (eye of the wind). Since you cant sail directly upwind, you have to zig-zag with opposite tacks across the eye of the wind.
Gybing (also spelled JIbing) - turning so that your stern crosses the eye of the wind (and the bow crosses the opposite point, "dead down wind"). Be careful as the boom wil swing from one side to the other, and it can be violent if you dont control it.
Sheets - primary rope used to control the sails, there are two on the jib, going to the aft corner. One on the mainsail, usually going to the middle of the boom, but various ways to rig it.
Take a look at GL's psot on "Basic Techniques":
https://forum.daysailer.org/forum/viewtopic.php?f=43&t=6280
A lot to learn, but he starts with some basic terminology. Sailing definitely has it's own language. Depending on your point of view it's either fascinating or frustrating. Personally, I like all the "nautical animals" - boats have horses, hounds, a mouse, worms, cat-heads, a rooster-tail, you can fish a mast, dog a hatch, rig a lizard, bear away, etc, etc... As you can probably tell, I see the fun side of the lingo!
Tom
Tom