I am an Old Earth Creationist, and I am not sure why you are a Young Earth Creationist, because a Young Earth is incompatible with Creation.
Let me explain.
It has to do with relativity, and not the E=mc^2 kind. If a man that was reported to be 98 stood before you, would you call him old, young, or don't know? (clue:most would answer "old" because he is closer to death than to birth). Likewise, many Christians believe that we are living in the "Last Days" which would imply that the Earth is approaching its death, and is thus closer to its "death" than to its "birth". Furthermore, according to Scripture, of all creating things, the Earth is the oldest object in the Universe (Sun,moon and stars come four days later). Ergo, the earth is the oldest object in the universe and is by many people's estimation quickly approaching it's death, that, by definition would make it "old" not "young".
So how are you a "Young Earth Creationist"?
In the spirit in which i took your comments about an Old Earth, I believe that God created the universe with the appearance of age: trees and plants were fully grown, animals were created mature and prepared to reproduce after their kinds, and that Adam and then Eve were created adults, not infants...fully able to reproduce, think, converse (with each other and with God), and fully capable of undertaking the tasks God gave them - to reproduce (be fruitful and multiply) and fill the earth.