I don't know if you have a demanding job but if not, you could fly from sunrise till before work you can get a lot done in the morning. You could fly all weekend. If you do this it will certainly take a shorter time than 6 months. You can theoratically receive your ppl in about 20 days. If you fly and study non-stop.
Unfortuanately if you want to become an airline pilot you have started a little late in the game especially since you have no flight exprience. If you don't want to waste airline seniority, I would seriously think about flying full-time. I would try to go to pro flight school such as ATP. Nice to know that you do have a degree. I'm working on mine. Good luck. Just keep in mind that every month or year wasted means airline seniority wasted.