For me when my oldest was 5 , we finally had my second when my oldest was 7 and it was great. I was ready for #3 when my 2nd was one year- old. Now they are 10, 3 1/2 and 1.
I did lose some weight to have my second but was overweight going in with my third. I kinda regret not losing weight before, I'm still 50 pounds overweight and our household have become so busy that exercising is almost impossible now.
By the way the spacing between my middle child and my youngest has been really hard on me (they are 2 1/2 years apart) middle sister will not leave the little one alone. It is very draining. My oldest gets along great with the middle one, they spend every afternoon together after school, in fact my middle one prefers big sister than mommy LOL. They are really close with a 7 year gap between them, when EVERYONE told me they would never be friends or like each other.
You have plenty of time, your daughter is still a baby imo, lose the weight and then go for it. give yourself 6 months to lose the weight and then start trying for #2, at least I would do that.
Good luck!