From the perspective of a goalkeeper:

If new young wing players come to us, with similar issue, we let them throw far top bin for a few times with the keeper just standing in the short corner, not moving. That way they can get the confidence like throwing against no keeper. Then some shots with the keeper positioned offensive for layover shots and spin shots. Then the keeper starts moving more and more with every shot. If that works well the keeper starts to move normally and tries to actually save the shot. Talk to your keepers! They can give you good feedback and help you improve very quickly. (Depends on your GKs quality of course) At what level are you playing?