We are not going to do any work for you, that is not how this forum works. We can however give you some info on how to achieve results.
First of all, you are using a lot of dirty tools. It doesn't really matter that much, but people are going to have issues with it, just warning you.
Your sprite's arms are far too small, they should be a bit longer and thicker. For the walking animation, try searching for threads on this forum. Here's two common references to use: