Hello! I too was an only, and that is a big impetus for me wanting a larger family. We probably have similar reasons for not wanting to repeat, the only thing

Anyway, my 2nd and 3rd were 18 months apart. I had worried about the spacing, since I loved the 3 yrs b/t my first two, but after the baby arrived, I loved the closer spacing too. It may have been even easier since he was #3? The pregnancy w/ the baby was harder since I was looking after the other two. That said, I am waiting a bit longer to try for the next, b/c my body just isn't ready. There are pros and cons for close and far spacings. Good luck!