If you want to stay in Greece and do animation, you will basically have a few ad companies in Athens that require animators, but they have very low salaries, maybe a small mobile / browser game team here and there with even lower salaries. If you don't necessarily want to stay in Greece, my advice is to look at demo reels…
In my experience, the advice on here has helped a lot more than what my university could offer. Most of the advice was dated. For example, needing a demo reel (this was a year ago). Anyways, as the guys above said, post your portfolio first and foremost.