Bristol unfinished

Sorry for the long update, i havent been on a paiting mood.Im sorry to say that i won't be finishing the Bristol painting as i have ruined it,i thought it was going well until i added what seems to look like a big great pile of trees/bush...looks like a jungle.(last pic)

to be fair i dont know the first thing about Watercolours or how to paint a tree using Watercolour or what paint brushes to use.

This is my first and last landscape painting as i am really crap at it and don't really enjoy it,i think you can see that straight away when you look at it.

Also for some reason i thought the bricks at the bottom of the bridge was different..so decided to paint the rest another day and yesterday i did just that....BUT couldnt remember what colours i mixed for the previous bricks of the bridge..therefore the Bridge is ruined to as well as sky as i used the wrong brush.

Just because i like to draw doesnt mean im good at it and im really questioning if im actually good at it..hhmm....

Can you spot where i have gone wrong??...if you ask me....the whole paiting has gone wrong..lack of brush technique,mixing colours,experience etc.:(
To be honest im not in a good mood myself and i took it out on the painting wich now has made me really sad.The thing with me is im such a perfectionist,i want to get everything perfect first time round....but who does????...am i asking for the impossible?
I hate it when a painting or drawing goes wrong..i know practice makes perfect but i feel like theres no room for mistakes if i really want to improve...guess i can kiss the art course goodbye!
nevermind...its never to late,im still on my young years!
Lets hope i can do a better job at lego...wich i dont think i can...hai!