Re road cranks 50/34 , first of all there's the whole technical aspect of front and road derailleurs and capacity with big cassettes (of which I too am not up on) , but most of this stuff is designed for 1x systems, well a 50t cassette anyway.

secondly, re a 50t chainring, add 20 or 30lbs to a bike and you'll see first hand that you won't be using the 50t very much, so I'd strongly suggest looking into smaller doubles, stuff like 42/28 or something, and then you'll have the added bonus of using a smaller, specifically tighter cassette with smaller jumps......but you're going to have to get good reliable info on what components work together.

good luck