Okay, yeah, got it. It can be difficult or even impossible to get really precise,finely graduated, local-area control over images when restricted to basic slider-based or button-based type editing software, but there could be options. For example...exporting this photo to Instagram, and using IG's editing options...in IG you'd have control over sharpness, shadows, hues, tinting, some nifty presets, and so on. Alternately, at times one can use simple controls over exposure, brightness, contrast, and very carefully play those things off against one another, in order to get a pretty good image.
Editing....Mac vs PC...I use Mac, have for years...it's Ford vs Chevy pretty much.
There are some
FUN on-line editing tools...I enjoy
Pixlr-o-matic, for example...it can be run off the web on a mobile device/phone, or the software downloaded an run direct from the hard drive while offline!
Vintage and Retro Photo Effects | Pixlr-o-matic | Autodesk Pixlr
SOME cameras (modern Nikons, for example) allow images to be
edited in the camera, after they have been shot! This image would probably benefit from a faked "
HDR Effect" application, and then after that, minor tweaks to get it just so. The faked HDR effect would most likely lighten up the deep shadows, and then you could probably use brightness and contrast to get the image to a very nice finished state.