Hi!
i’m a total beginner to blueprint … i watched the blueprint playlist uploaded by unreal engine on youtube, it was helpful but i don’t understand how that would help me with my own projects, because i will not find everything i want to add to my game on youtube… i know nothing about blueprint nodes, so i can’t play with blueprint by my own. so where should i start with blueprint.
tell me how you started blueprint 
thanks
Something tells me you are new to programming generally.
I think you should begin here: CodingIntro.com is for sale | HugeDomains
Then google things you don’t understand and slowly you’ll make your way here: Blueprint Visual Scripting | Unreal Engine Documentation
However I believe in practical approach and always had best results copying what others did, learning how it works and using that knowledge to build something better than the original.