There are a lot of new players, which is why Crystals are relatively cheap (since newbies supply them) but the gear new players want to buy is expensive (demand is high). I suggest checking out the guide I wrote for new players which mostly avoids using the AH to make your first chunk of gil:
viewtopic.php?f=6&t=4645The past few days have been rough because we're recovery from a DDoS and not everybody has grabbed the new launcher. There are a lot of people who would otherwise be partying that are with family, or doing the X-mas event ingame too. (the X-mas event mostly benefits players around your level, so I don't blame them). When you were seeking, were you in the dunes? I know it's rough, but without a subjob, a lot of players will choose someone else over you first, especially as a WHM.
I think you're just experiencing the rough times that any new WHM has. I was there too a year and a half ago. I wasted gil on DEF pieces unfortunately and had no gil guide to follow. Don't worry too much and focus on improving yourself, then those parties will come easy. Making friends with the people you party with helps too - they'll invite you again!