Hi @earnestf-lloyd, sorry, your questions somehow slipped my radar!
Are you trying to do it manually, or are you trying to use an auto-stacking feature in Photoshop? I don’t have experience with it, but I think Photoshop has an “Auto-Blend Layers” feature. Did you try the steps outlined in this article? https://photographylife.com/how-to-focus-stack-images