One way is that you may submit it in PSD categeory, or else you can ask the community by giving the design screenshot or HTML views here to get feedback.
^ Wonder what they are doing??
Try some tutsplus course in HTML & CSS:
Some free tuts
2. http://webdesign.tutsplus.com/author/adrian/ (Check this guy’s tutorial)
3. Try nettuts+ and also webdesigntuts+
Lot more with a google search
Hope this helps.