What's the Best age difference between kids?

My husband and I are planning our second child and I'm torn between the age gap. We have one baby girl named Mila Jhene, and she's 11 months. She'll be a year January 1st. We are thinking we'll try this next year for baby number two. I'm a little nervous because just having one baby is a lot of work, and wondering how I'll handle two. I know I was nervous thinking the same with my first pregnancy, so it's just the unknown that can be a little scary. She's my life. I'm also a little sad/nervous that it will no longer just be her and I. I know that'll obviously change though once I have another precious baby, and it'll all be OK. For now I just thought I'd share my heart while asking for advice and support. ❤