Would it be possible to write and authorize the will at a lawyer
office but to not writing in the will the steps to follow regarding
her properties but, instead writing them down in a easily-changeable
Generally speaking, a will does not contain that level of detail. Most decisions regarding the disposition of individual properties are left in the discretion of the executor.
More often, dollar amounts or percentages or general types of assets are left to particular people, and the decision regarding how to accomplish this is reserved for the people dealing with the situation as it actually is at death.
When Alice will make any changes in this document, she probably wants
to notify her executors, but not needing to notify her lawyer, since
the actual will document is not changing.
At 30 she may want to add that 10% of her money should go to a charity
helping kids with some kind of heart disease that she would have had
and was cured. At 31 she buys a small land and decides that after her
death that small land should be donated to the church she was part of.
Now, for all these little or bigger changes, she won’t have to notify
the lawyer but because the will was already written mentioning this
signed document kept securely, she would just have to change this
printed document every time and sign it.
In U.S. jurisdictions that have adopted the Uniform Probate Code, there is a concept called a memorandum of disposition. The will refers to the existence of such a document and it lists items of tangible personal property and the person who is to receive them, and is then signed and dated without witnesses or notarization. In the U.S. this is limited to tangible personal property and this is allowed only in a minority of U.S. states.
I believe, but do not know, that this was an idea copies from an Australian state.
To my knowledge, no European country has an equivalent provision.
Instead, any changes to the content of a formal will would have to be done in a notarized codicil (i.e. "amendment") to the existing will, or by revoking the existing will in its entirety and writing a new one.
Honestly, this is much easier to do now than it used to be, with the magic of word processors, but each codicil and new will would have to be witnessed and notarized just as the original will was.
Common law jurisdictions also have documents known as revocable trusts that are used as will substitutes. These can be amended with fewer formalities than a will (typically just a notarized signature without witnesses). But, these kinds of trusts are unavailable or rare in countries outside the common law legal tradition.
In part, revocable trusts have no arisen in non-common law countries because the process of settling up the affairs of a decedent is done mostly non-judicially with the counsel of a notary who is a trained legal professional in those jurisdictions who is also an official record keeper of various kinds of important legal documents eliminating concerns about authenticity and the capacity of the people who signed the documents, to a great extent. In contrast, in the U.S. the probate process necessary to implement a will or adjudicate the estate of someone who died without a will, is very expensive and time consuming in some states and involves pervasive court oversight.
So, civil law countries didn't have the practical need and desire to avoid probate that is common in civil law jurisdictions.
Another example would be that at 20 years of age, she will write in
that document that she wants to be cremated and her ash to be put in
the ground, but at 23 years of age she adds that the ash should be put
in the ground and also plant a tree. Maybe at 26 she updates the piece
of paper and says: part of the ash should be put in the ground and
plant a fig tree, and the other part in a river.
Provisions regarding the disposition of one's body at death are not generally included in the will itself. Disposition of someone's body and the conduct of the funeral typically takes place within several days or at most a couple weeks after a death, with planning usually beginning within 24 to 48 hours after the death is discovered. But, this is insufficient time to be sure that one has located the official will to be located and authenticated, and for any dispute regarding the will's validity to be resolved.
More often, a separate document, often drawn up with the help of clergy from the person's church, or with the help of a funeral home director, specifies the disposition of a person's body and their funeral wishes.
In many jurisdictions this document has no legal force and the ultimate decision is vested in the next of kin or the executor. In other jurisdictions, there is a separate document in addition to the will that has legal force and is often executed with similar formalities. I do not know the relevant rule for Romania. Either way, the decedent's next of kin usually honor those wishes whether they were binding or not, out of moral obligation, and it isn't as if the dead person has an ability to complaint if they don't.