Okay, here's my go at it. I think it's actually pretty much fine as it is, but I tried to up the drama a little. I've got a more dramatic example of my own, but I don't have the original right here. I'll try to remember to post that up this evening. But for yours, I did several layers, masked so that the effects on each only were applied to part of the image. Two layers were for the upper, more orange part of the sky. First I tweaked curves a little, to make the midtones darker while preserving the highlights. This made it quite red, so I also did a colour layer to try to deal with that. It wasn't entirely successful, but it does make it more dramatic, if not more true-to-life! This is just an exercise, after all. I did another layer for the bright yellow areas near the horizon, used levels to bump the midtones down, much as I did with the curves layer. Then, just because I'm procrastinating again, I did a quick levels on the water, to lighten up the midtones, at least where the sky reflects most strongly. It all took me about 10 minutes, including doing it once and deciding you wouldn't actually be able to see any difference at all!
If you like that sort of thing, photoshop can be a lot of fun. I confine myself to these sorts of things that I figure I would have done in the wet darkroom (dodging and burning, basically) and try to keep it under 20 minutes per image. If it needs more than that, I really messed up!
Bear in mind, I'm a rank amateur at this, too, but I like a challenge. Can you see any difference? Do you like it?