Hard to level up Weapon/Armor smithing
Take a look at the many crafting guides out there. It’s not that hard to level these skills at all
I use http://www.gw2crafts.net/ when I’m in a hurry with a particular crafting skill. But, for the most part, just gearing up my alts leveled me pretty quickly.
Rock, Paper, Scissors, Lizard, Spock.
If you are new and 17 is your highest you are looking at an expensive endeavor if you want to rush to 400. You won’t have access to many of the upper tier crafting materials until you are a higher level. My suggestion would be to craft as you go like you are doing, which means you won’t hit 400 until you are a much higher level.
Or if you must, use the link above and buy all the mats, although for those 2 crafts you are looking at around 20g.