I’m trying to add a progress meter to my blog’s sidebar, but the site that I’m looking at tells me that I need to make a CSS style sheet…and I have no idea what that is. Every site I go to is complicated and assumes I already have some familiarity with CSS…is there anyone who can point me in the direction of a good website that explains this, or who can explain it to me, here?

Also, any information on how to make progress meter would be really helpful!