Well Sippi is certainly off to a great start! You've done an excellent job posing. (Note the rear toes even with the hip joint and the front toes even with the eyes). Sippi isn't stretched out too far nor tucked too close together, and he's showing off his mandolin type nicely.
The younger EL can be difficult to pose because they are so curious and full of energy. They would much rather go exploring than sit still, so it's important to work with them from a young age.
His ears must be over 21 inches - they look like they have good substance and width.
He's got a very good head and appears to have good bone.
He's got good color and the preferred blanket pattern. (Although there are not many points on pattern/color). He should be molting into a better coat soon (from the baby coat to the correct flyback).
His mid-section appears to have very good depth, but the high-point of his topline appears to be too far forward (rather than over the center of the hip), and the depth of the mid-section doesn't carry through the hindquarters.
His biggest fault will probably be the lack of fullness over the hindquarters (common fault in the English Lops). In general, they need better hindquarters (fuller, firmer and rounder). He appears to be "chopped off" at the back of the hindquarters - note the line straight down from the rump as opposed to a rounded butt.
He certainly looks promising - can't wait to see him as a intermediate and a senior!
Looking forward to reading all the critiques
I think it will be fun for those wanting to learn more about rabbit judging.
Pam