First step is to pass all 14 ATPL exams. Then make sure you have the required hours - do you have 500 hours multi crew time? (You mentioned no type ratings)
If no, you'll only be able to get a CPL/IR - 22 hours training and 2 flight tests in a SEP/MEP then an MCC course.
If yes, it's a little fuzzy in your case. Normally if you work for an airline you'll do an ATPL test when you do your next LPC, but without an EASA type rating, I guess you'll have to do a full TR course, then ATPL test.