Some great advice from my good friend @Claes, there. My images look very different to most, and I take a very different (and somewhat unconventional) approach to my workflow overall — thanks to such wonderful tools as RawTherapee, Darktable, GIMP, Krita and the like, we can pretty much achieve anything we desire as far as processing and editing is concerned.
I cut my teeth by diving straight in and just playing around — sometimes, it’s the best way to learn. When I first started, I knew next to nothing about anything, let alone how to go about getting the results I wanted; now, I know every square millimetre of my favourite RAW processor.
I suppose the point I’m trying to make is this: there’s nothing ‘wrong’ with your images; it’s likely that you’re comparing them along side others that have been processed differently. Trust me; with a bit of practice, you’ll be able to make your images ‘look’ exactly the way you want them to.
And on a final note, it’s completely normal to think that everyone else’s photos look better than yours. We ALL do. 
I can’t improve on any of the rather excellent advice already given about actually taking photos, but thought I’d chip in with a bit of encouragement with regards to the processing and editing side of things.