I think if you only have that much in your bank, start with some freebies.
Some good ideas:
coinchat.org you'll love it, you get paid to chat
Also, try some freebies in the gambling section, if you are allowed to gamble. If not, claim the prize and run
![Tongue](https://bitcointalk.org/Smileys/default/tongue.gif)
That should already have made your 18 euros in a few days, if you are consistent enough. Browse the forums, contribute to ideas, learn some stuff. Pretty soon you'll be rich with bitcoin!
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)