To be confident and feel comfortable enough to bring your personality on set, you have to practice your model poses.
You should have a wide variety of images in your modeling portfolio, which you can achieve with different model poses and emotions.
If you don't give enough variations, all the pictures will look the same, with just different backgrounds and clothes, but it will not show diversity, which is very important to have in your model portfolio book.
Start with wearing different outfits and stand in front of the mirror. Create different model poses by moving your hands, arms, tilt your head, re-position your legs. Pay attention to your facial expressions and emotions, from laughing with teeth to a smile without, to a confused look, and try to go even further until you reach a place of confusion and pain. This will give you a wide range of moods and emotions, remember you are telling a story in a photo.
You see, a lot comes to play in creating a successful photo session. If you are brand new and don't have the experience, you can be wasting a lot of money organizing photoshoots before contacting agencies without knowing if its a success. Prices can up quickly, and the quality can be questionable as you have no idea what a model manager is looking for.
Great photoshoots will defiantly increase your chances of being signed. It helps the model agents to visualize a modeling portfolio book already, they can directly start their marketing on you, 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 I will share with you soon. Photoshoots, in general help you gain confidence, you can enjoy the experience and have amazing images and memories doing so.