Having my second baby

So I just want opinions, honest ones. I know regardless its my choice and everything, i just want some honest opinions from some people.

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So I’m 18, i have a four month old daughter, i am engaged. I have my own home, and my fiance & i are both finically stable. I have been thinking i want to start trying for my second, i want to have my kids closer in age so that they aren’t super far apart, i just don’t know. What do you think? Do you think its too soon? Should I wait? If you have had a child soon after having your first, how was it?