To be frank I would not pursue such a course if I were in your position. Working on antique locks is generally a specialization within the locksmithing industry that a locksmith may pursue when he has many years of experience of working with standard modern locks. Furthermore it requires a great deal of experience with different mechanisms and designs & a plethora of skills over and above those of a standard locksmith, such as :
lathe work
spring making
silver soldering / brazing
fabrication
Without the required background, aptitude & experience the most likely outcome is going to be a broken or otherwise damaged lock that cannot be replaced. Furthermore clients for such work generally expect and require perfection 1st time, not a learning experience carried out on their locks.
I appreciate that the locksmith trade is a disaster at present, furthermore I appreciate that a specialization is necessary to survive in it but to try and specialize in antique lock work early in a career is not the way to do it IMO.
I’ll move this thread into the general forum ….