How do you know you’re ready for a second child?

I’m a FTM and my son is 6 months. Some days I feel like I’d love to give him a sibling but other days I feel like I could never manage having two children. I’m 32 so I don’t have the luxury of spacing far apart in age (if I did have another I’d want to be done by 35). Thinking about having a second child stresses me out so much that it gave me a panic attack the other day.