I was able to get to the BOOTME [...]. Did it again where it goes through and stops and says operation completed successfully. That's where I'm stuck. Firmware still will not show in DJIGo app.
You flashed the bootloader, but you did not checked whether the system now boots. Connect your TTL-to-USB again, but instead of opening the port with TI Flash Utility, do it with terminal program like PuTTY.
Also, read this for some details:
Firmware m1300 · mefistotelis/phantom-firmware-tools Wiki · GitHub