There are relatively few jobs in Valencia that explicitly look for Technical Drawing expertise: At present, Jobspotting features 3 jobs for 3 distinct employers. The most common categories in this area are at this time Drafter and Labour Law.
A significant proportion of jobs (33%), is available to junior staff with little or no previous job experience. In this area, internships are hard to find. Unfortunately, there aren't any on Jobspotting. On Jobspotting at this time, there are no startup companies offering jobs that have to do with Technical Drawing. Why not have a look at jobs in another country to compare and contrast opportunities. Just use the Explore tab.