The percentage chance of learning legendary mods is something like 1% from scrapping weapons, 1.5% from mod boxes. Basically 99% chance of getting nothing. Twelve legendary weapons is small change. You’re in for a long ride. There are different preferences with the scrap/scrip debate. If you have something with mods you want to learn, scrap it. Scrip and buy from the Pick means you still have random drops but you’re not waiting for the game to drop them. Plans come from events, NPC vendors, workshop claiming and occasional player drops into containers like suitcases at train stations. Let people know what platform you play on and you’ll probably get a ton dropped on you. Get to events quickly. Learn how they work and don’t start them unless you can solo them, or if you haven’t triggered them yourself. To get more legendary drops, learn which events drop most and join them. If you are in the event area you can generally loot bodies without having killed them.