Instructors are Instructors and you have as much chance of instructing on a PPL as a CPL, at least the school will know you are not there pending an airline job. Commercially operated flight schools probably don't do much PPL training but there are plenty of flying clubs that will be able to use you. Once EASA FCL is enacted (2112) at the latest, you will be able to be remunerated for PPL instruction on the basis of a FI rating on a PPL.