Is this too much or not bad? I plan to keep my recovery keys in four separate locations, a brand new flash memory from Huawei, a brand new WD External hard drive, my book with a strong cover and my wardrobe, in my wardrobe you can't easily see it because its always dark in there, I use my torchlight to carve those words in there and its even written on the top inside the wardrobe, I tend to keep it this way for now till I can get a Nano X.
a simple notebook would do the trick, of course, you'll have to make sure that the notebook will be in a safe place. if you want, you can make multiple copies of it to make sure that if one is misplaced or destroyed you still have a backup.