You can write your own will if you are a non-muslim without the need for any 3rd party, except for the 2 witnesses. Read this and also this as your starting point

After that just keep it in a safe place. I think that is where the issue lies, not with the actual writing of the will. Someone must know that you do have a will written, for it to be implemented.

Hypothetical.... what if you and a sibling both pass on while in the same car wreck? Everything gone forever?

The will is allowed by law to be written by the individual, but I always say the passing on of the information is the issue that has to be figured out
- write a will and keep in the house? What if the house burns down with you in it?
- keep specific information in the cloud? Legality of e-will and passwords to access
- keep will with lawyer/will writing agency? Family must know to contact the correct firm after death
- pass on multiple copies to few people? legality, and must keep track of multiple copies
- give someone/multiple people master password? password changes how?

Don't get me wrong, I also am thinking of how to solve this problem. That's why following this thread for ideas. Right now I have the single copy at home, but I think I am going tp be giving another copy to a trusted friend (who is not a beneficiary) and having a second copy around in case of my passing.

You're correct. But the timing of the Letter of Administration/Grant of Probate will then be affected, as the information will only come out after 1 year. Not to mention your estate may already be disbursed, and then suddenly after one year it is found out that you actually have a will. I think you are on the right track though... maybe make it 3 months time interval

Apologize if you are meaning something else, but the LA or GP is not a "method"; the next-of-kin must have a LA/GP* before they can begin to do anything to your assets. It's basically the High Court saying "yup, he ded, can start sharing the loot"
The issue I see is that the court may issue LP/GP before my wishes come out from the dead-man's-switch in Google, and by that time my assets may already start to be shared.

*Letter of Administration, if you do not have a will
*Grant of Probate, if you do have a will

I question your logic, but I admire your confidence!