-As to what jobs I'd reccomend picking for ffxiv as a starter-
Anything that interests you really, since you're able to play any job besides DNC, GNB, BLU, RDM, DRK from the get go, unless you buy the expansion(i think)
however if you still want to play any of the jobs mentioned above you can still "swap/ reroll" off your current class mid way and play the class you actually enjoy, thou you may have to spend abit of time into leveling them up again.
but if you really need some info to go on, here is what I can conclude thus far, you'd want to have at least 3 diff roles at lv 50, so you can run your routines for daily seals and allagan tomes, mainly a dps, tank and a healer class.
the classes mainly spreads thin into these categories :
Under the DPS category you have;
Ranged Physical damage
Bard (archer)
Dancer
Machinist
Ranged Magical damage
Black mage (thaumaturge)
Red mage
Blue mage
Summoner (arcanist)
Melee Physical damage
Monk (pugilist)
Ninja (rouge)
Dragoon (lancer)
Samurai
Hybrid ranged and melee magical damage
Red mage
Under the Tank category you have;
Warrior (marauder)
Paladin (gladiator)
Dark knight
Gunbreaker
Under the Healer category you have;
White mage (conjurer)
Scholar (arcanist)
Astrologian
THE META
Best personal dps, Best raid dps, best AOE dps
Black mage, Samurai
Best AOE speed clear
Bard, Dancer, Samurai
Best overall support buffs
Bard, Astrologian, Dragoon
Best party utility buffs
Astrologian, Dancer, Bard, Dragoon, Ninja
Highest DPS tank
Warrior
Best Damage mitigation tank / healer
Paladin, Dark knight, Scholar, Astrologian
Best DPS Healer
White mage, Scholar
Best Party Damage mitigation
Paladin, Scholar
Best Burst healer
White mage, Astrologian
-Honorable dps mentions-
Red mage, machinist, monk
-Honorable off tank mentions-
Gunbreaker
TO NOTE
ANY and ALL classes are viable and are able to solo most of ffxiv msq/ quests on their own (except bluemage) so play whatever you want with only 1 fact in mind and that's the fact, that DPS queues for raids/dungeons will be a lot longer as compared to a healer or tank