Once you are in the bow era, slowly begin to get important tames like pteranodon etc (that you'll use to upgrade to an argentavis later on) and preferably something with decent weight, look around for metal veins (or just check the internet resource maps), farm metal, smelt it and then in smithy craft metal items along with the crossbow
For guns, you need a fabricator, the only weapon you'll need from it is a shotgun, and longneck too if you care about crafting tranq darts (a decent % crossbow is all you'll need though), the rest are a small addition - you'll need cementing paste (chiting farm+stone farm aka argentavis+doedicurus), electronics (either farm it on extinction from tek dinos, or farm sillica pearls+metal, and the rest are easy to get





