Solo all six starter jobs to Lv.10. Sell the drops to fund equipment. Keep in mind some stuff sells for higher prices on Auction House, while some to NPCs.
Take WHM into the parting levels first; relatively good invite rate, and having a support job which can give you Sneak and Invisible is always a nice option to have, even if you don't want to level WHM as a main.
After you unlock support job ability, then you can decide which jobs to level further.
* * *
Long term gil outlook wise, FFXI provides more and more varied opportunities roughly corresponding to job level and which jobs one has available. For a beginner, here are two good resources to look at: