Do missions if you’re not the exact level or you can get loot drops you have a 1% of getting it or it just random. Hope it helps

I tamed one before I got a saddle and I waited so long to ride it

A good way I found to get chitin is farming the scorpions with a axe you get like 120 -140 each

Works as a smithy but you can’t repair things in it

Kill trillobits and you will get a lot of chitin

Kill bugs to get the most chitin

a good way to get metal is to breed a pack of argentavis and make them follow you when you go to farm metal because they have a metal weight reduction so you can carry more and don't forget to get a ankylosaurus for more metal

don’t bring your bird in to a sticky situation

Tame a saber and cave or look for bugs they get around 40 chitin per kill

Although it technically can make Behemoth Metal Gate frame, your Argy is unlikely to be able to hold ingredients in its inventory.