For a begginer, not bad. But you still have to work. Erase the edges with a soft round brush to blend it a bit. Add some flow and light source. Blur the background a bit to create depth. AND, ALWAYS hold shift button while resizing!
Good to know there is at least one newbie like me on this forum^^ Anything new? I like the lights on the 2nd one, but the render doesn't stand out enough.