To be confident and feel free enough to bring your personality to the photoshoots, you have to practice your model poses.
Your goal is to create variations during your photoshoots, use different model poses and emotions to get a wide variety of images for your modeling portfolio. If you are stiff and don't give enough variations, then all the pictures will look the same, with just different clothes and backgrounds, but it will not show diversity, which is very important to have in your portfolio book.
Wear different outfits, stand in front of the mirror, and create different model poses, move your hands, arms, tilt your head, re-position your legs. Focus on your facial expressions and emotions, from laughing out loud to a smile to a confused look and go even further until you reach a dark place of frustration and pain. This will give you a range of emotions and moods, remember you are telling a story in an image.
You see, many factors play a role in creating a successful photo session. If you are new, with no experience, practice, or guidance, you can be wasting a lot of money organizing photoshoots before contacting agencies. Prices will be costly, and the quality can be questionable as you have no idea what a model manager is looking for.
Great photoshoots will increase your chances of being signed. It helps the model managers to visualize a modeling portfolio book already, and you have proven that you are worth investing time and money into your career. You will be able to book jobs by yourself through the platforms that share with you soon. Photoshoots, in general help you gain confidence, you can enjoy the experience and have amazing images and memories doing so.