From an aesthetic perspective, aim for your wing to not go past the bend of that style of hook.
If you feel your wing is sitting high, make sure you make a level flat thread base for your next wing tie down.
You can also shape the wing stem to your desire by small pinches on the stem with your fingernails.
Everything Adrian said and also try and use four feathers for the wing. Another good thing to do is fold the stems back after you tie the wings fold the stem ends back over the tie in point and then tie them down. This will make your wings sit lower and help so you don’t pull them out when tying your fly on with cold hands. Nice looking fly I think a steel face would take a bite at that one!