you say your first Longbow?? dang ...very nice ...thats a great accomplishment !
a couple suggestions...
on your next bow - round those edges a little more... any hard edges will get dinged and can raise splinters.
you might also cut your string notches down a little further from the tips.
any 70# bow is likely to be strung with a stringer ...for most of us anyway!
who was the one taking those picture of you aiming the arrow at 'em?
obviously someone who trusts you?