This is a 'quick and dirty' edit. I rotated 0.2 degrees, ran it through Neat Image, sharpened.
If you want to make some/all of these adjustments I'd suggest that you use your original file (a copy of your original - always preserve your 'negative') and then reduce it for uploading.
Always check sharpness just before uploading. Lots of file reduction programs seem not to have a sharpness routine built in - the final product is often less sharp than the original.