Why did you choose 24 words instead of 12 words? If I were you, I would focus on 12 words and would move on 24 words when the risk of future breakthroughs and other types of attacks increases. At the moment 12 words is as safe as 24 for the current technology. To be fair, I suggest to not depend on your memory but since it's your choice and you plan to do it, then I'd suggest you to change your mind and stick with 12 words. 12 words is more likely possible to my mind because it's not much but 24 words are too much. If you are confident in your brain, then do as you wish but be very careful if you plan to save your every Bitcoin there.