Fairly New, Some Questions~

[Archona]

2. its okay while leveling it doesnt really matter, using soulstone job give you a bit extra stats and some exlusive job skill. Pretty sure the lvl 30 skill isnt really that great

3. crafting will cost you a lot of gil and on my server it doesnt really sell right now :/ dungeon gear is better but theres RNG, GC gear reward is on par with crafted gear i guess.
a suggestion, get all your DoH to level 15, the cross skill really helps and you will feel awesome when you are wearing your own crafted high quality gear

Crafting your own HQ gear COSTS gil, it does not generate gil. Also, the Materia is the only thing that makes crafted gear better than darklight, and getting good materia melds will also cost you a lot of gil. Darklight and CT gear is more than enough for starting the endgame.