I personally recommend the ONN headset, https://www.amazon.com/ONN-Virtual-Reality-Smartphone-Headset/dp/B0758L67MZ
It's even better if you have a 3D printer and you can make parts to suit it to your needs.
I printed some pieces to stop most of the outside light from getting in, but I also wired some headphones into it for a better experience, which I would recommend doing for any headset thats based of a mobile device.