No offence Floater619, but after seeing your maps, I recommend that you keep practicing mapping before you enter any competitions. Your maps are not at a high enough quality yet to win any competitions. Just keep practicing, and get feedback from us, and you will soon become a very good mapper. When you become a very good mapper, you should start entering competitions. I'm no perfect mapper, but I have been mapping for about a year and a half now, and Build A Machine was the first ever competition I have entered. I'm not saying you have to wait 1 and a half years, seems that I only recently discovered this site, but wait until you a producing maps rated 3-4 stars in the map vault, because at the moment, your maps are getting 1.5-2 stars.
However, It is evident that you are trying. Keep up the effort and we will soon marvel at your great maps