Toddlers are terrible. Have you dealt with other age groups? Do you know how you tend to fare with them?

I'm asking because if toddlers are genuinely your only problem, theoretically, you could adopt an older kid in the future. Which is great—older kids need to be adopted more, they tend to get left behind. But you need to make sure this is absolutely ONLY and issue with toddlers your having, and not something else.

Also, you should want kids because you're ready to have children and you want to love and raise happy human beings into adulthood. Make sure that's your reasoning first, and not just because you want to bond with your dad or create a legacy for yourself. It might accomplish neither and you'd still be left with a choice you can't go back from.