wolverine110

well, I am considering buying a new gun, I had thought about a rifle for a while now, but my friend has encouraged me to look at shotguns. I have two questions for anyone willing to help me out. 1. being that I weigh only 135 pounds (soaking wet) is a 12 guage going to knock me off my feet (would a 20 guage be better?) 2. what type of shotgun would one recommend for a beginner looking to just go to the range every once in a while to blow things up? thanks for the help!