You should sign in to EFA, after that career.cockpit, and then career.aero. Yeah it sounds hard, but it is more simple. Firstly you should sign in to EFA and fullfill the application form. After that you have to wait 2-3 days and they will send you an email with the next steps. Job offer is not needed I think, I didn't do it. You are applying for academic program not for a job, so is not needed.