I have pretty much taught myself so far using google the internet posting pictures asking questions and for the most part taking pictures. I sometimes think i might be missing a few tricks my aim is to produce a technicaly acruate pictures composed correctly and executed well. But i guess its just a case of keep shooting.
A wise man once told me that the difference between professionals and amateurs is professionals take more pictures and show fewer of them. And that was 30 years ago, before anybody other than the NRO had digital cameras.
Your landscapes need foregrounds, unless you intend them to be desktops. Humans are suckers for depth of field. Also motion. Still wheat always loses to blurry wheat.