Having a second child or not

A few months ago we were 100% sure that we will just have 1 kid. Now my daughter is 2 and she will start school a few hours a week in September. We have a bunch of trips coming up this year (Disney, Europe, cruise, etc) that are excited to do with her.

But what about after? Last night we started talking. Are we complete? How challenging will be having another baby? How positive/negative will a sibiling impact on my daughter's life?

I'm a stay at home mom and I try to bring her to have new experiences always. I'm nervous that I won't be able to once the baby is born.

Wondering if 3 years apart is good or should I wait until she is in elementary school.

Can someone share experiences

Thanks!!!