Re: advice to a beginner please.....
Ditto Davo's suggestion re: taking a class at a fly shop. It is worth calling local stores or checking their web sites b/c many of them offer free intro classes. Also, if you can, it is worth paying for an hour casting lesson as it is hard to unlearn bad casting habits after they have developed.
Don't worry about being overwhelmed. I think we all were when we started. Just focus on one skill/topic at a time. For example, read about targeting bluegill on the surface and then try fishing for them. Then, go back and read the info again. The info you just read will make more sense. Once you are comfortable or feel ready, move on to something else. Read a little bit, then try it, read a bit more, then try it, etc....
Youtube actually has several good casting videos. Maybe someone else can help out with links for these? I think they were previously discussed somewhere on this forum.