P0onky,
You have a ICAO PPL so can go straight into ATPL Theory either fulltime or distance learning. No need to convert.
Complete the 14 EASA ATPL exams and then do the required Flight training for CPL and I/R then follow up with an MCC course and you have a "Frozen" ATPL.
Can do the training with any approved EASA school or schools.
W1