If you have no real desire to craft and just want gear, hit battle craft Leve's. Always look for treasure chests and if you plow through 20 or so, you will get an Aetherial weapon and often a bunch more Aetherial stuff. For some reason I don't get them at 45, they stopped at 40 but you can fit multiple classes in Aetherial using this method. I find the weapons drops tie to the origin place of the class. So do level 30 in Gridania for bows.

Your Grand Company will also have good gear.

If you enjoy crafting for sure, level some up. Woodworker is a good choice for first craft but get others to 15. Unlock them all, do the 1, 5 and 10 quests in each one. That will get you set up with some shards that should tie you over up to around 25. If you enjoy it you will see levels melt and you won't really seem like you worked that hard at it.