Well, you don't mess around sam.
Actually the Jantar looks like a pretty decent scale glider at a reasonable price. However, I know nothing of it's flight characteristics, so take that with a grain of salt.
Do you have someone lined up that can tow a glider of that size? It takes some experience to "tow" a glider by the way. As is true of most things in this hobby, it's harder than it looks.
Does anyone in your club fly gliders? The easiest way to get started is with a smaller electric as mentioned by Ballgunner. Next easiest would be with a "High-Start", which is usually about 25' of a bungie like material with some length of nylon cord (50' ?). One end is pegged to the ground (the bungie end), the other end has a loop that sits over a pin in the bottom of the fuse. Usually just forward of the CG I believe. High starts can be purchased for around $50, and I've seen them go at swap meets for as little as $20.
Anyway, not trying to discourage, or slow you down, but you might want to find someone locally that's been flying them for awhile.
Dennis-