No worries. I wish I could take an actual welding course... I've got a basic knowledge of arc & MIG, but really only enough to realize that a really good welding job is an art.
Not sure how in-depth the jig course was, but the only thing I can suggest beyond the X, Y, Z coordinates is to pay attention to the datum structure (it pains me to say that because of work lol), i.e. make sure the part is located by the pins and not the bolts, etc.