Re: Looking for Tips!
Here are some tips. I hope they don't sound to harsh as it appears you are just starting out. In fact, normally for someone just starting out, there should only be one tip, and that is, keep practicing and learn about your materials and how to manipulate them.
But since you asked...
My most important tip is this: work from a photo and not your imagination. If you do that, you might avoid:
Making all your mountains look the same, with straight sides like a pyramid. Most real mountains have more variation and slopes with different angles.
Your sky is very colorful but rather undefined. Is the orange area clouds? Sky? It seems rather an abrupt transition from orange to blue. Again, a real photo will give you information on what a sky does at sunset, what parts turn what color, etc.
Since this seems to be a sunset, the sun would be behind the mountains, thus the fronts of the mountains that we see, would be in shadow. If they are, the white of the snow would not be so light and white. Without meaning to sound too redundant, if you use a photo, you will see what is in the light and what is in shadow. You don't need to go overboard with light and shadow, but it needs to be consistent to make a painting believable.
Again, don't take these comments too hard. It is not easy to paint from the imagination for most painters. And it is not easy to learn oils. So practice and have fun and at some point think about my tips.