Work on your comp and framing; you have some decent subject matter, albeit a stroll through the park; but the comps are all off and actually detract from what could be other wise nice shots.
Compositional ideas for you....
Keep bright areas away from the edge of screen, your eyes follow a frame like your reading a book from left-to-right.
They will follow lines to the source of interest, that's why people place eyeline on the horizon line.
Straight lines for powerful stills.
Diagonal lines for action, to make the image appear more exciting. See your last shot, although you’re splitting the screen in half, if you would have placed it higher in the frame the shot would have worked better. The still water isn’t the exciting bit right?
For the sky shot, you included the horizon line too low in the frame-straight line so your attention is drawn to that and the sky seems less important.
The single shot of the water shooting up works because the lines lead you to the interest.
Under the bridge shot doesn’t because it's leading to the pillar not the water blast.
Fountain...too many lines...what do you want the viewer to be looking at...
Hope this helps...welcome.
White balance.
I have a cold/blue setting on A.
And a warmer reddish on B.
Then use your preset to mess around with.
Just play man.