Says me and my decade plus years of liftimg and seeing and talking to most people's about strength levels and tracking stats on websites dedicated to tracking strength levels among lifters...
Nobody expects him to be Aaron Donald but struggling with 20 lb dumbbells is a sign he doesn't actually either train hard or eat properly considering he's skinny as hell
That's the problem. Everyone says they got of decade of training and can't remember they were struggling with light weight year 1.
Give him some time to build himself up. Nothing wrong with posting a workout when it can motivate people who don't train to get started.
Plate watching will always be corny.