There is plenty of information to get you started in the sticky threads at the top of this forum. Have a read of those and any other threads that interest you. If you then have any specific questions which haven't been answered, feel free to post them here. However, your question in this thread is much too broad to attract any meaningful answers, so I'm closing the thread.
To answer your question about posting a link in the forums:
Once you have been a member for 90 days, the option to add a signature will become available in your profile. Until that time, please do not try to add a link or "fake" signature. Your signature, and all other external links on the forums, are "nofollow", so if you are hoping to gain backlinks by posting here, I'm afraid you'll be disappointed.
You can find the full rules pertaining to signatures [here and regarding other kinds of self-promotion or self-linking [URL="http://www.sitepoint.com/forums/faq.php?faq=selfpromo#faq_selfpromotional"]here](http://www.sitepoint.com/forums/faq.php?faq=youraccount#faq_signatures).