Is it a good time to conceive...

Keiana
So my boyfriend proposed in June we both have our own children, he has a 4 year old boy and I have a 3 year old girl.... do you think we should start trying... or should I wait another year, both our children our in preschool & both children have said they want a sister... and we are both very much committed to trying... I'm just unsure if I'm ready I want to focus on work but it feels like the right time for us.