Here is a list of some cool design and typography pools at Flickr you should join and start posting your work to:
Experimental Graphic Design
Design & Typography
:: Graphic Design & Typography ::
International Typographic Style
international graphic design
Graphic Design Blog – You the Designer
Please do not be shy and do this. Maybe start off with some of the less ambitious ones at first and then proceed to the more sophisiticted ones at a later time, when you have more accomplishments as yound designers.
You will hopefully get good comments and feedback, which will help improve your work for sure.