A few general questions...

I went through all the stages of smellslikebakin, which I thought was the introduction,but is it not?

I started making my own website, but I'm doing that by re-watching a lot of the videos from smellslikebakin. But..the problem is every time i try to re-visit old content, it becomes a little more difficult because it always wants me to resume where I last finished. Does that make sense? Is there a way to go through all old content as if you haven't completed it?

Also...I was curious about the answering questions options. I believe there's a way where you can answer other peoples' questions,like the one I'm asking, to reinforce previous learned material. How do i do that?

These are a lot of questions,but the answers would help a lot.