Started new painting

I started a new painting but made mistakes right at the start. The main problem is size.

I made the fish really really big and one duck about the same size as the fish and the other duck much too large. The other thing I did that didn't work is that I built up the surface so it's really bumpy and now when I paint over what I painted, the bumpy surface shows through. Really messed up. But at least now I feel I know what to do. The other thing I did which didn't look good is that I painted the plants different colors when it's much more effective if I keep the plants different shades of green and blue. I did start to fix the colors of the plants. The design works much better that way. So at least I'm learning! 

But this is really FRUSTRATING. I'm going to have to paint over the two fish on the bottom left and the large duck on the right. And then the surface will be really bumpy so I'll have to paint over it more than once to reduce the bumpiness. What a drag....