Eysha
You are asking for feedback & education - so may I put on my educator's cap
1) you are travelling with the TZ30 which has a good zoom lens
2) many of these images appear to me could benefit from more use of the zoom lens &/or some 'vote-with-your-feet' relocation of camera's position
3) many of the images appear 'grab' shots rather than 'photographically-created' images
4) the weather / heavy clouds will negatively affect both the exposure and the White Balance ~ each needs to be adjusted as required
Okay - images as to camera use:-
#1 - could you have stepped 3-4 steps to the left to reposition the train and erase the brightly coloured slide from the background?
#4 - it seems to me that you've left the moment a tad too late - the swan boat is already leaving the centre-of-photo. Could you have taken it a moment earlier? or could you have walked 3m to 5m to the right and reshoot it as it came into the camera frame for a 2nd time?
#5 - what are you trying to show me? ... the bollards lying on the grass or the flowers in the old row-boat? or the child having a drink of coffee? I think that the rowboat & flowers was what caught your eye - if this is the case could you have moved to camera-left to erase the coffee cart? - could you have zoomed in closer to concentrate on the flowers? - could you have walked onto the grass near the rear of the boat and got a closeup of the flowers?
#6 [section-2] - again ... what are you trying to show me? If the flowers have captured your eye then show me the flowers - show me the bloke walking through the flowers
And images as to Histogram & pp:-
You mention that you have used Levels on one or more of these images...
The histogram that comes to life via Levels shows us many things - 'dark bits' plus 'bright bits' and 'middle bits' of the image as a whole
While most people tell us to 'slide the Shadows pointer &/or the Highlights pointer inwards till they meet the histogram, few people tell you about moving the centre Midtones pointer to fine tune the exposure
I invite you to do this with several of your images ~ click the mouse onto the number 1,0 in the Midtones values box and then use the keyboard arrows to up/down so that you can get precise results
Here's image #2 where the midtones pointer has been moved from 1,0 to 1,6
Here's image #6 where is seems to me your image options are
and
Here's image #7 where is seems to me your image options are
To conclude, I think that you have lots of possibilities here
Some comes down to 'seeing photographically' before pressing the button; others come down to a bit of alternate pp after the event
I trust that this is helpful to you
virtual hugs to a lovely lady
Phil