For any carry, get a farm above 7c.s/m easily, make changes according to your champion and rune, long or short "Depends on the rune".
Build correctly, put 2 types of items in your head that many don't know which to make, especially against defenses. Liandry and King's Sword, are good against tanks with high hp, Void staff and Dominik/Serylda and the like for champions with high defense, you as a carry will want to build according to this need and if you are a tank you will adapt against this too . If there is no need to do either, just do AP and AD to the maximum and enjoy. Hope this helps.
I'm Diamond 2 in Brazillian queue, without using any programs.