What is the best position for my sub to take documentary pictures for anal training?

I have recently started a new D/s relationship with a partner of a few months and we’re currently working on preparing her ass for her first anal sex. I am away traveling, and we agreed that she should be required to train her ass almost every day while I am away. In order to document this, she is required to send me a picture with her legs pulled back so I can see her pussy and ass with her plug peaking out. It looks similar to this position ( https://www.google.com/search?q=butt+plug+in+with+legs+up+porn&sca_esv=332c45449e59f683&rlz=1CDGOYI_enUS686US686&hl=en-US&udm=2&biw=393&bih=665&ei=yb7tZd4RrqLk2g-1v5-gCg&oq=butt+plug+in+with+legs+up+porn&gs_lp=EhNtb2JpbGUtZ3dzLXdpei1zZXJwIh5idXR0IHBsdWcgaW4gd2l0aCBsZWdzIHVwIHBvcm5IywxQ_QNYiQtwAHgAkAEAmAFJoAGBA6oBATa4AQPIAQD4AQGYAgCgAgCYAwDiAwUSATEgQOIDBRIBMSBAiAYBkgcAoAeOAg&sclient=mobile-gws-wiz-serp#vhid=tJAp6DFe0Mx96M&vssid=mosaic )I like this position, but it does have some downsides, especially because she has to take the pictures herself. Please let me know any thoughts you all have on different positions and general anal training tips for a beginner. She is apprehensive to do enemas, but I am currently working on that and she wants to try them as a way of cleaning her out before anal. I would also love advice any of you have for a newer Dom.

On all fours her butt facing a mirror,legs spread so you can see her breasts between her legs hanging from her chest

On all fours or standing bent over at the waist

Join the following links:

https://ge.xhamster.desi/videos/olivia-anal-training-5505243

https://ge.xhamster.desi/videos/tiki-anal-glass-plug-training-8559561

https://ge.xhamster.desi/videos/anal-training-xhOeQzU