Where can I get free advise on designing correct UML diagram?

Question

Hi Everyone:

I use Visual Studio when creating projects using C or C#. However, the proper stages of the SDLC requires that I have UML diagrams. I already know how to create UML diagrams however, I wanted to get advise on whether my diagram was correct and properly reflecting the user requirements. If I get it wrong then designing the sequence and class diagrams will be harder. I also do no want to skip the steps and go straight into coding because I know that is a bad practice. I am doing the IT project on the side to gain experience so there are no colleagues or supervisor to obtain feedback from. My other friends are busy with their projects. Any suggestions on forums or developers that I can go to for free advise? I want to be able to show a sample diagram and few bits or requirements and get some feedback.

Thank you.