Pregnancy confusion..

Hey guys.. So I'm 17 and no I do not want a baby! Lol I'm just wondering.. I've been seeing lots of posts on here about pregnancy and I don't even understand half of it like what is ttc and stuff hahaa? I'm also wondering why people are saying they have been trying for a long time to get pregnant, I thought it was easy to get pregnant .. That's why we use protection. I probably sound like a very uneducated little kid and I'm a bit embarrassed because I feel dumb right now but yea?