Opinions and advice please

I’m 19 with baby #2 coming. I don’t want to tell anyone because I’m scared of what people will say or think. I’m happy but worried it’s too soon. When my second baby is born my first baby will be a year and four months old almost five. And I’m just scared, is it a good thing to be close? Has anyone else had a similar experience Or had babies even closer together? I just need advice and opinions.