How do I know I'm ready for baby number 2

Ella
My little man is 9 months old. I am sooooo broody! I don't want my children to have a big age gap. It took  a very long 7 years to have Harrison so do I just start trying again knowing it might take just as long again..? How do I know I'm ready again encase it does happen quickly.
How long did it take u for baby number 2? When did u know ur ready again?