Hi chickbabe
You sound very mature and know exactly what you want. I met my DH when I was 15 we had our first DD when I was 21. I used to get the same comments from my family and friends about being too young. Although my first pregnancy was not planned, my second and third were (and my fourth -well thats a whole other story!!lol) I felt confident that I was a good mum and still am. I think we spend way to much time worrying about what other people think when we are the only ones that know what is right for us. My parents were and are very supportive - just took them a little while to get used to the idea.
Good luck with TTC.