How to stop being giggly immature and laughing all the time? Be more professional?

Well depressingly as it sounds I'm 30 .

I want to progress my career but WOMAN always look down on me when I was quiet I was called shy and quiet now I'm bubbly to strangers I get called nervous but I also think I come across immature.

I find lots of things funny and always cracking jokes, get on better with younger peers.

Woman sometimes role their eyes at me in most occasions even if I'm not directly talking to them. And mainly my level staff or higher band staff are less bubbly.

How do I stay calm and professional at all times? ?

I want to apply for more managerial positions and although I'm not loud or the loudest I just giggle at the most stupidest things and come across fake... I heard in my life so many people say 'how do people laugh all the time' I got a lot going on in my life which I've share in moderation but yeah it's hard being a woman sometimes