If you are looking to experiment with different poses for your selfies, the butterfly light effect might be something you can try out, positioning the lighting source behind the camera, like in the photo below:
Photo by: @sarahbroadgatemua | MUA | Bridal, Makeovers, 1-1 Lessons
When posing, it’s a good idea to have something for your eyes to focus on so that your eyes are looking in the direction as your nose. Also, having a background the complements your style can add a subtle touch that makes the photo more attractive. Holding the lighting source higher above but not necessarily the camera can help eliminate unflattering photos. You can use a secondary lighting source directly below your chin like a reflector. So long as you are using two lighting sources this will eliminate unwanted shadows.