As a secondary school diploma I did the Ib which is only valid in Germany if you have 28pts or more. I had 27 which meant that my diploma wasnt gonna be valid in Germany and I could not apply to the Lufthansa ab-initio programme. I therefore decided to follow a modular training route alongside completing a university degree. I recently found out that by having a uni degree I would be able to apply again. I know for a fact that the max FLYING experience you are allowed to have is a ppl but I am not sure about the ATPL theory part. I sent them an e-mail already asking about this but never received a reply.
Hope you are not confused anymore