This is what the default recovery mode looks like. Pressing Power + Vol-Up while on this screen should open the menu options, though that’s not of much further use. As you’re getting default recovery, this:
didn’t work. The most common cause for this is not rebooting into recovery immediately after fastboot mode. As per the comment on the TWRP install guide:
Note many devices will replace your custom recovery automatically during first boot. To prevent this, use […] the proper key combo to enter recovery. After typing fastboot reboot, hold the key combo and boot to TWRP. Once TWRP is booted, TWRP will patch the stock ROM to prevent the stock ROM from replacing TWRP. If you don’t follow this step, you will have to repeat the install.