SEO for www.vsimoglou.gr

Hi there, I have created a website for my sister, which is a psychologist. Here's the link: [login to view URL] The site is built on wordpress. I now want the site to appear in the first google page, when someone hits those keywords: "psychologist athens" (i.e. ????????? ?????) "psychological support athens" (i.e. ?????????? ???????? ?????). I am interested for all the above 4 keywords, both in English and Greek. I am not a computer expert and thus, I cannot do it on my own. I have put several tags on each page of the site, so that I will receive more visits. The current visits come mainly from facebook, google+ and linkedin. If necessary, I will also use google adwords, so that I will make it to the first google page. P.S. Freelancer does not support the Greek letters, and thus it appeas like "???????". I will translate those 2 keywords and provide them to you.