I have ablog  under the name archamid on RCgroups.com, how do I add
pictures to my blog?

One simple, quick way to do this is by going to imageshack.us, and
uploading your picture via their upload form.  After it is uploaded,
the site will give you a unique code, based on what you want.  I think
that that should answer your question.

Another way is to use a site called photo bucket
[http://www.photobucket.com].  If you sing up and upload your photos
to there.  Once you do photo bucket will provide you with the
information you need to copy and paste into you blog post.