Thoughts on having kids young?

So my coworker knows that I’ve been having baby fever, and keeps telling me that I should have one.

She had her first child when she was 15, and her last in her 30’s. She says that it’s better to have a child young because you have more energy and it’s easier, and when you’re older you don’t have much energy to spare in the first place haha, which kinda makes sense.

My boyfriend wants one, and I don’t really mind either way.

I would just like to hear different thoughts on this, especially from people who had children young, what did you like about it and what’s some things that makes you wish you would have waited a few years?

Thanks in advance!

(Keep in mind that I am over 18, so I’m an adult, But I’m under 25 which is what I would consider a young age to have a baby)