Hi lydiad! Welcome to the site! :)
A great way to get started with gesture drawings is to check out these articles:
https://line-of-action.com/gesture-basics-1-line-of-action/
https://line-of-action.com/gesture-basics-2-torso-and-hips/
https://line-of-action.com/gesture-basics-3-joints/
They give you a good overview of what gestures are about. They intend to capture motion and proportions to give you a proper foundation to work from. They're also great warm ups when you sit down to draw a more detailed image, which can help motivate you to finish what you started! Doing 30 to 90 second gestures frequently can help you draw faster the more confident you get too.
Do you have any works to share so far? If not, I hope you can share your gesture drawings with us as you practice!