Please help me achieve this!!!

I recently just started a new office job and after spending some time in the office and getting a general vibe of how people present themselves there, I want to try and make myself fit in while also looking as nice as I can. I’ve always loved having long hair, but I hate how it looks when it’s straightened and it looks too unkempt and gets easily messy when in it’s natural state (I have naturally wavy hair that gets the tiniest bit frizzy, but only enough to be noticeable) so I was wondering if anyone had any haircare tips to help me with keeping my hair as neat as I can throughout the day as well as any products, tutorials or techniques I can use to get loose curls like the girl in the photo? Any advice would help, thank you so much!