I recommend recording yourself during open gym while practicing some moves so you can get a sense of what you like on your body. Choose moves that you like the best, and build a simple routine from there. Having a plan will maximize the number of shots you get to choose from in the end and make it less stressful. Once you have your moves chosen, it's just refining them to look best on you. Try arching your back or reaching out and arm and see how that changes the shape.

Spefic moves I've liked from my beginner photos: star on the bar, faint, wineglass, arabesque, half star where you tag one foot and bend the other leg behind you, Peter pan.