Take the money you would spend on the course, fill up your gas tank and go find some nice landscapes to shoot. That will do way more for you than ay course.
If you want some good advice there are a few ways to go about this but I have always preferred to look into what the masters did to get their great shots. There are a ton of free documentaries about Ansel Adams floating around youtube that tell a lot about how he worked and are well worth the watch.
If you are in the Philly area I'd be happy to show you a thing or two for free.
Regards
Dave