First of all, follow the article Getting the T95 Plus to boot from an SD card.
Once you have done this, download Armbian_22.02.0-trunk_T95Plus_bullseye_legacy_4.19.219.img.tar.gz.
Unzip using your favourite tool then write to an SD card with Balena Etcher or similar.
The image is just a balbes150 with a DTB injected for our board.
Pop it into your box and boot.
The image needs HDMI and keyboard for the initial configuration.
Plug the keyboard into the USB port next to the reset pin.