| Overall, not too bad.
My suggestions:
The contrast is too strong/harsh. Increasing the contrast also brings out a lot of imperfections and noise. Go for a softer contrast. Not only will it keep the image looking more like the original, it will save you some work.
Removing the background, and replacing it with "clouds" is a no-no. IMO, this is the biggest mistake, and I see it all the time. It's a lot of work to make selections all around the edges of the subject in order to change the background, and it hardly ever works out. Most times, the end result looks like cut & paste. Put that effort and energy into repairing the background. Repair the background as you would the image - it's just as important.
If you insist on replacing the background, there are a couple of things that need to be done-meticulously. The blending between the background and the image must be undetectable - no dark or light "halos" where the background meets the subject. Changing light to dark, and vice versa, is tough. Save yourself the agony, and keep it the same -work with it, instead of against it. The noise, sharpness, and contrast must also match. The "new" background must be "real". No canned clouds, etc. Look at some portraiture for background ideas.
I hope you find this critique/advice is helpful, as you've already got a good start.
Vikki |