Systems Biology Using SBML/BioPax

Hello

I am planning to work in Systems Biology using SBML/BioPax. To start with I just want to work in SBML esp. I am new to this area of research. I kindly request the experienced person in this area to suggest me some useful tips and links to browse, so as to learn the same from basic in a systematic way. An introductory tutorial with a basic example will be much helpful.

Your kind and valuable guidance will help me to proceed with my work in a right way.

Thanking you