Sounds like you find different skills difficult to start for different reasons, like a lack of starter info or a big requirement like lots of GP or items.
This is really good stuff, thanks guys. Are you ready for question 2?
Mod Kat
For me, it was definitely summoning. I remember being there when the skill came out. Sure, completing the quest was easy enough, but then you get charms to start, but wait, you need the seconds? Oh well, EVERYONE ELSE is fighting for them too. I remember countless hours trying to collect spider carcasses near yanille dungeon.
It got easier to train though. For a brand new player, definitely dungeoneering.
All of the skills are fairly easy to start, some are difficult to get materials for but the essential understaning is pretty smooth. In my opinion, Hunter was the toughest to start, once you figured out home the tracking from burrow to burrow went, then it got much easier.
Construction: Expensive, and so much clicking >.< And if you mis-click, or right click something too soon, then you have start the process over. Wayyy to much focus required for my tastes.