I used a sponge yesterday to try it out and this morning i tried something else.

With a wet sponge dipped into a bit of paint you can fill the entire paper/canvas within a few minutes. If too much paint at certain spots you make the sponge wet and wipe it out. You can also use a brush to wipe it into different directions

This morning I tried something else after trying out a piece of wall (fell apart I fixed it but never painted it new). With a big wet brush I made it green (good wet too, the wall is fixed with plaster (the walls are made of sand - hay - water, a kind of clay). It went very fast. I made with the same brush (the side) grass on it. I painted in the dark since there's no much light in that corner. I am satisfied about the result. It went fast (way faster than painting a wall) and I didn't by fat that much paint as when I had to buy it at the paint shop (not to mention the mess).

The water I wetted the brush in turned green. I used that to wash this morning paper (light green and good to make a layer over a paining), It worked well and fast. It's just a few brushes or strokes with a sponge. You should start with that and leave the details. You can do that later.

We all feel frustrated. The same counts for me but practise is needed and that's why I told you, you need a paper to test the colours, the brushes, what is possible. It might not be the painting you have in mind (yet) but it's all valuable.

By now I can still not paint with watercolour like I have in mind.. Can be due to the paper (and lines) and I have by far not the time to focus for hours on a painting but I try to paint daily even if it's only backgrounds like I do at the moment.

Can be only the quick one I made this monring within 15 minutes on a thin piece of paper is finished. LOL

Don't give up that easily... try out the colours, the brushes, try your finger, a cloths, paper, whatever you find. You can paint with everything.