I hope it's alright I copied your lines!! I'm horrible at drawing horses or unicorn digitally XD
Try drawing the mane like this but without the horrible lines I put XD Draw it on the other side I'm bad at drawing it on this side XD
The forelock seemed too messy.. Mine looks too short and probably is.
The eyes looked too high up. I tried drawing them where you did, but they didn't seem to look right.
I'm probably not the best person to redline this, and yours looked great!













