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

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

Try fishing if you are not high enough level to get this

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

You can use it as a smithy I got an Argy earlier today