Hi, Peter & John, This is a difficult one to advise on, But I would suggest having a look at Fusion 360 for the hobbyist (free) and have a look at your local
Makers Space pop along and ask if anyone can help. Maybe knocking on the doors of local machining companies. I looked at the refreshing my skills but at £1200 per day, one to one training I went out brought a small milling machine with my savings.
I wish you all the best with your quest.