Solo Female Athens, Greece -> Seville, Spain

Hi everyone!

I am attempting to solo hitchhike from Athens, Greece to Seville, Spain. Has anyone done a similar course and has some tricks and tips? Any safety concerns? Im most concerned about going through Balkans, I have heard the pick up times are longer than usual... which countries should I go through?

I am planning to go at the end of September, if anyone here is planning on a similar trip, let me know! It would be my first solo hitchhike and ngl, would love some company:)