Hmm, never had that question asked in my life haha! Well seriously, just take your time and do less signatures but make them better. Also, don't do smudge banners. Not yet, if you're a beginner.
You must also use focal points, it really draws the attention to what you want to show. Here is where I explain it really shortly.
One last thing, think about what you want to transfer to the viewer. What emotions/feelings do you want to give to him?
Other than that, try things and keep it simple!!!