pics are easy. start an account at a hosting site (photobucket.com is on and it's free) and then upload your pics to the site and then copy the link and put that in your post. photobucket provides the coding right by the pics after they've been uploaded. it's a really easy site to use...there are more than a few others too.
glad to hear there are drain holes in the bottom of the pot...hopefully it's an unglazed clay pot too!
best to water from below. set the pot in a container/dish and fill the it with water. let the pot sit in the water until the water is absorbed up into the soil. you'll want to refill the water until the side of the clay pot changes color and becomes cool to the touch up to about halfway up the side. depending on how large the pot is, watering should be done about every 10 days or so in winter. usually a set 7 days in the summer (cuz it's hotter).
artificial light is okay. real sun is better, not totallly necessary tho
it will just not grow as quickly with the fake light (and they don't really grow all that fast to begin with anyhoo).
how long have you had it?? if you've just recently brought it to your house, it might just be in a bit of shock.
jades can be finicky when moved. if the lighting is different now from where it was before, you'll see leaf drop. if you can, try to duplicate the lighting from where it was before...just for a little bit if you really want to keep it where you've got it...let it get situated and then gradually move it to the new location (over the course of about 2 weeks if you can do it).
if it's been doing okay and suddenly started losing the leaves, you may have overwatered it. if it's in regular potting soil, that can happen easily as it doesn't really drain all that well. jades do better in cactus
soil or even a mix that has bark bits/lava rock in it.
do the trunks feel mushy? are there any odd-looking spots - brown or black in color? what about bugs? anything like white fluff in the spots where the leaves come out of the branches? or little brown spots that flake off if you get them with your fingernail?
a pic would really help!