I have started doing pushups every morning. For which muscles are they exactly? Inner or outer? I am a bit and I guess that first I will have to fat layer that have on my stomach. I think that that way it will be allowed to inner muscles to show up.

That’s true. I included program with pushups every morning. I did it three months ago and have the results. That way I have developed my inner and outer pectoral muscles, also abs, triceps and muscles. I increase number of pushups that have to do weekly. Doesn’t take much time but is really very effective.