I cant get on with a loupe
Hey David it’s not just you. Lots of people give up hassling with loupes. The eye glass clip on loupes are excellent alternatives as well as the loupes that have a wire band attached to wrap around your head. Visor are good to have too. There are some visors out the that have similar clip on type magnifiers permanently attached to them that seem to work pretty well too. Also many members use microscopes now that the prices are so reasonable.
Good luck with the Waltham and please ask question, make comments, add pics and details about your watch if possible and keep us posted on your progress as you go. Notice I say “progress”? It’s a encouragement thing. 
Good luck David!
Bob