Although this was not without errors and frustrations (first times can be so awkward), I did can two jars of zucchini relish today! I halved the recipe from the Ball Blue Book (just wanted to learn the technique--didn't need four jars!) Heard that satisfying "pop" sound after I took the cans out of the water bath and tomorrow morning I'll check the seal. Yeah, I did some cursing (in two languages), but in the end I just go excited to do some more.
Okay, I forgot to release air bubbles in one jar, the lids came to a boil and had to be replaced, and I didn't have quite enough vegetables (I guess the volume measurements meant "packed"). My canning rack apparently was good for pint jars, not half-pint jars, so the jars kept wanting to topple. The jars also touched the bottom of the water canner, so I fashioned some sort of contraption out of a foil grilling drip pan to keep the jars from contact with the bottom. I need to take lessons in jar lifter technology and I have the vegetables floating on top of some pickling liquid. But despite it all, I'm ready for more! With peaches starting to come in, perhaps peach jam will be up next!
And I want to thank all you Chowhounds who helped out by answering my questions!