So do I make a nandroid by accessing the bootloader or is there a different process? I'm looking to get this done over the next few days
Two ways to get started -
Plug in to your pc, go to your command window where adb is and -
adb reboot recovery
Or, go to your bootloader by holding the volume down while powering up until you start to see the white screen - in the Hboot screen, volume buttons to select RECOVERY then tap power to go there.
Then you're in TWRP. The Backup button is right on the main page.
The little gray bar that says internal storage is a button, tap to change to SD card if you prefer, both work fine.
Little gray bar with backup name is a button, you can guess the rest.
Default is to backup boot, system and data - that's a nandroid backup. Let it do compression and don't skip md5 generation - iow, accept the defaults all the way on the backup details.
Only change the name and / or location and those only if you feel like it. Date in the name is always a good idea but not required. The defaults are fine for your first one.
The whole process will take you less than 20 minutes the first time, including getting in, backing up, and rebooting.
After you get on to custom roms, you get the advanced power menu (APM) - and you can choose to boot into recovery when you like - much easier.

