The best way is Try yourself with any of your friends galaxy note or if it's not possible then tack a piece of cardboard and cut it 146.9 x 83 x 9.7 mm. Now put it on your pocket or hand. If you feel comfortable than go for it.
SGN is a great dev...
Simply go to recovery mode. Wipe catch / factory reset - reboot
Which ROM do you want to flash?
I recommend you to play with you're device for sometime until you understand everything beneath it.
After that decide which ROM you want to flash.... than stick with that ROMs installation instructions.
Thanks! One more question. Will following those steps wipe everything currently there is in my phone? Like all the apps installed and data in the sdcard?
It will wipe all the apps..
Data on SD card will be safe..
Tx to Dr. Ketan... I copied this from his thread.
If you have logo_q1.jpg draw failed" error (Thnx Schaggo)
Go back to the firmware you had, root it, flash newest or in fact any CF-Root kernel. Then start over.
Redownload the ROM. Extra...