So I know that this is your first wedding so take what I say with a grain of salt. Personally I'm not a fan of any of the photo's minus the dancing shot just a little... Like said early the photo's are too soft, which maybe your shots were slightly out or blurred and thats a way to hide mistakes but for me if the shot isn't in focus or blurred it 99.9% of the time get deleted or in PP I fix it to where its sharp... Next now currently I'm on my laptop which I do not trust color wise but your skin tones seem off which SOOC canon sometimes has a hard time getting it right... So a simple color correction would help that. The first picture, assuming its the flower girl personally I don't seem how the shot is set up. I see she is holding the flowers but there is something else in front of it don't be afraid to pose her the way you want. Which also many wedding photographer may call themselves PJ but sometimes you the artist need to take control and make the shot (I come from a background in corporate/commercial photography). So I think that shot could have been posed to look a little better. Second image now this one was posed but when you pose it like this the people in the back look smaller, so aim to get everyone together so you don't have this problem and try to make it look a little more natural... When people are posed uncomfortable it shows... Now the third image, this one has a lot going for it but it could have been executed better. Now it looks like you were using a flash and not sure it you were bouncing but my guess is that you were shooting directly at them, but the killer is the bright wood on the left corner, just crop that out and straighten the image up (my OCD). Now on to the fourth image, again like the last one this one really could have been better.... Instead of putting them behind the potted plant put them in front and use a 70-200@200 to get the image compressed and maybe use a little OCF to fill out the light... With doing those adjustments the people would be bigger and the house in the background might be blown out a little better...
So just take what I said and work towards the future, we all had to start somewhere and my first wedding pictures I deleted them I was soo ashamed, so take it as a learning experience and go on from there.
And below are some of my shots: (All shot with the 5D3)
The top one was shot without flash at 11pm at high iso
The second one was shot with an flash off to the right through an umbrella to add just a little extra light
And lastly this one was shot in a VERY dark reception during the dancing with a high powered bounce flash
All three shots I told the couples what to do and made the shot I wanted, use your eye and make the art you see.