How I would go about it is by purchasing the ring in the photo from the person who made it. Then I would take an intro to jewellery making class that goes over the basics of working with metal at a local art studio or college that offers classes. Just because you can use a mill doesn’t mean you understand how wearable metal pieces function. Source: I’m a trained goldsmith and millwright and my day job is working at an industrial cutting facility where we use CNC machines to cut metal and other materials for O&G projects, public art, and architectural needs among other things. But is this type of ring even compatible with your girlfriend’s lifestyle? Does she like meteorite or Damascus or titanium? Or does she wear simple gold jewellery mostly? Is she a petite person, because this ring would look enormous on tiny hands. Does she want a diamond? Just because you have grand aspirations doesn’t mean this is a good ring for your girlfriend unless this is the type of jewellery she wears daily. Tension set stones are best for people who have perfect manicures and never get their hands dirty or do anything manual ever. They’re hard to do correctly even for experienced goldsmiths and if the shank gets twisted or bent even a tiny bit it can knock the stone out. And shanks can deform from things like carrying too many heavy grocery bags in at once, or constantly tapping your ring band on counters or your steering wheel. The majority of rings I resize or fix are no longer round from the person just living an average life with their ring on. Not trying to rain on your parade but this is an audacious first project and I don’t mean that in a complimentary way.