Thanks for this Christina...
Makes me feel a bit better and reminds me that I should never, ever, complain about highs that hover around 80 degrees year round and when I need to pull out a sweatshirt when it drops below 70 at night
But back to your images and landscape project...
I know that you have been working pretty intensively on landscapes for a month or so and are getting frustrated and in a way I feel like you might be on the edge of 'finding' something out about photography and your approach to it. So, I would encourage your to plod along and not change gears due to the frustration.
This comes from personal experience in a class that I recently took that lasted 4 months and required us to commit to a portfolio theme. In the first month I was really excited about the project and then the frustration set in...I couldn't think of or find a shot that met my theme statement to save my soul! I plodded along and my thoughts about the overall portfolio theme changed and so did my approach to creating images. The images were more well thought out and I was really putting myself out there in terms of my ability to be present when I was shooting and I found that as a result I saw scenes in front of me differently.
I will put myself out on a limb and say that I think that you might be focusing a little to intensely on the technical aspects of PP right now. I approach learning PP based on the image immediately in front of me and what I saw or want to portray and then I try to figure out what PP techniques I need to get that result. I have some curiosity (and a desired to learn) about other techniques so I follow sites like this and then file interesting techniques away for when I need them - then, and only then, do I try learn the technicalities needed to apply them to my images. Does that make sense?
So in the case of your imagery maybe you should start by asking yourself first and foremost how to you want the image to look when you are in front of the scene and then what various PP tools will be needed. My guess is that you have a lot of the tools already in your kit but that you are trying to apply each and every technique to each and every image.
To that end, I am currently reading
The Art of Photography: An Approach to Personal Expression which has been quite a revelation to me in terms of my overall approach to photography. Here as a short quote from the book:
Do not limit yourself to capturing the scene as you see it; start to think in terms of interpreting the scene and creating a work of art, a personal statement.
You might also be interesting in watching Scott Kelby's video titled "Crush the Composition" which I thought was well worth the hour and is available on YouTube.
I hope that you take this reply in the spirit it is intended and not as anything negative. There is so much to learn and it can be overwhelming - just don't forget that it is supposed to be fun or at least rewarding along the way