How backup and where store my BTC

I want to buy Trezor which has 24 words, and divide it into three parts so 2/3 will complete the seed.
As I understand sheet metal is the most common and safe way. Let's say that 2/3 I will keep physical
in home on a sheet metal and other part 1/3 on cloud. my questions are the following:
1. which cloud platform will be good for storing the 1/3 seed? is One Vault will give me good security due to the fact it is protected by PIN and 2FA, but its cons that the text file need to be created locally on my PC, I can create a VM and first thing is install fw, AV and do nothing apart creating the txt file and save it on One vaulet, do you guys think it will be pretty much secure? I would like to hear alternatives in case you have

1. what do you think will be the safest way to store the seed in my house? I'm 20 M, live in my parent's rented private house, my parents have their own house which has a warehouse, I thought to store it inside the wall, which recommended alternatives do you know?
   
2. should I make a will digitally or print it? and even for me in case I forget where my seed stored, where should I document it?
   

Thank you for any assistance you're able to provide.

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