I had intended to respond to this thread. . . thought I had but must have closed that window before I was done typing. I really love that you have shared your work over the past 3 months and shown us how much you have learned, it's really impressive and inspiring to others, myself included. No matter how much better i get I realize I always have so much more left to learn, and seeing someone learning things inspires me to not be afraid to jump in and learn something new myself.
Only suggestion that I'd give that hasn't been touched on before would be to try adding a bit more color variation in your work. I've found mixing a palette of colors off to the side and picking from those while painting them in has helped my work considerably, I've got a ton of interesting colors that are placed with care each time and has given my work more depth and life I feel. In my current piece I am noticing that I'm struggling with green quite a bit, it feels so saturated everywhere that it feels wrong somehow. I suggest putting some less saturated slightly darker or lighter and slightly warmer or cooler areas in with your bushes and such to give them some depth. Aerial perspective applies to this for dealing with green things in the background picking up some of the sky color and desaturating while getting lighter in value. I guess the easiest way to say it would be use more greyed out colors in other areas of your painting to make your focal area 'pop' more. Good luck, if any of that didn't make sense feel free to inquire further.
Also I'll share my work in progress with my notes there so you can read how I'm approaching my painting and see some of how I'm building it up.
Landscape
Edit: Someone mentioned that the sunset looked more like dawn, and I think that has a lot to do with how the eyes perceive colors at the end of a day, we tend to be more tired and see colors less clearly, also things tend to get redder in the evenings due to the sun's light passing through more layers of atmosphere which filters more of the light leaving more of the strongest spectrums of color (which tend to be reds) to pass through the atmosphere which is what we see. So people generally see sunsets as warmer and more orangey and reddish and far less saturated than they may actually be. Psychology meets art, it's fun!
- Delo