Since you have short hair it'll be difficult to grab all hair in one bun. There are two methods to wake up with loose waves.
Method 1: Make Multiple Buns
If you want extremely loose waves I would suggest sectioning your hair in four sections and make four buns. Previously, I posted a card on how to achieve effortless waves with this method, you can refer to it here. If you want more volume you can make more buns, refer to the video above for demonstration!
Method 2: Use a Headband
If you have thick hair this method works best! You won't end up with frizzy hair. Follow the 2 minutes video above on how to achieve a loose textured wave!
If you have any questions or comments, share below!